Clicker Questions Chapter 10

Save this PDF as:

Size: px
Start display at page:

Transcription

1 Clicker Questions Chapter Pearson Education, Inc. Essential College Physics Rex/Wolfson

2 Question 10.1 Density If one material has a higher density than another, does this mean that the molecules of the first material must be more massive than those of the second? a) yes b) no

3 Question 10.1 Density If one material has a higher density than another, does this mean that the molecules of the first material must be more massive than those of the second? a) yes b) no Because density is defined as r = M/V, the volume matters as well. Thus, it could be simply that the first material has a more compact arrangement of molecules, such that there are more molecules in a given volume, which would lead to a higher density.

4 Question 10.2 Consider what happens when you push both a pin and the blunt end of a pen against your skin with the same force. What will determine whether your skin will be punctured? Too Much Pressure a) the pressure on your skin b) the net applied force on your skin c) both pressure and net applied force are equivalent d) neither pressure nor net applied force are relevant here

5 Question 10.2 Consider what happens when you push both a pin and the blunt end of a pen against your skin with the same force. What will determine whether your skin will be punctured? Too Much Pressure a) the pressure on your skin b) the net applied force on your skin c) both pressure and net applied force are equivalent d) neither pressure nor net applied force are relevant here The net force is the same in both cases. However, in the case of the pin, that force is concentrated over a much smaller area of contact with the skin, such that the pressure is much greater. Because the force per unit area (i.e., pressure) is greater, the pin is more likely to puncture the skin for that reason.

6 Question 10.3 On a Frozen Lake You are walking out on a frozen lake and you begin to hear the ice cracking beneath you. What is your best strategy for getting off the ice safely? a) stand absolutely still and don t move a muscle b) jump up and down to lessen your contact time with the ice c) try to leap in one bound to the bank of the lake d) shuffle your feet (without lifting them) to move toward shore e) lie down flat on the ice and crawl toward shore

7 Question 10.3 On a Frozen Lake You are walking out on a frozen lake and you begin to hear the ice cracking beneath you. What is your best strategy for getting off the ice safely? a) stand absolutely still and don t move a muscle b) jump up and down to lessen your contact time with the ice c) try to leap in one bound to the bank of the lake d) shuffle your feet (without lifting them) to move toward shore e) lie down flat on the ice and crawl toward shore As long as you are on the ice, your weight is pushing down. What is important is not the net force on the ice, but the force exerted on a given small area of ice (i.e., the pressure!). By lying down flat, you distribute your weight over the widest possible area, thus reducing the force per unit area.

8 Question 10.4 While swimming near the bottom of a pool, you let out a small bubble of air. As the bubble rises toward the surface, what happens to its diameter? Bubbling Up a) bubble diameter decreases b) bubble diameter stays the same c) bubble diameter increases

9 Question 10.4 While swimming near the bottom of a pool, you let out a small bubble of air. As the bubble rises toward the surface, what happens to its diameter? Bubbling Up a) bubble diameter decreases b) bubble diameter stays the same c) bubble diameter increases As the bubble rises, its depth decreases, so the water pressure surrounding the bubble also decreases. This allows the air in the bubble to expand (due to the decreased pressure outside) and so the bubble diameter will increase.

10 Question 10.5 Three Containers Three containers are filled with water to the same height and have the same surface area at the base, but the total weight of water is different for each. Which container has the greatest total force acting on its base? a) container 1 b) container 2 c) container 3 d) all three are equal

11 Question 10.5 Three Containers Three containers are filled with water to the same height and have the same surface area at the base, but the total weight of water is different for each. Which container has the greatest total force acting on its base? a) container 1 b) container 2 c) container 3 d) all three are equal The pressure at the bottom of each container depends only on the height of water above it! This is the same for all the containers. The total force is the product of the pressure times the area of the base, but because the base is also the same for all containers, the total force is the same.

12 Cola Question 10.6 The Falling Bucket When a hole is made in the side of a cola can holding water, water flows out and follows a parabolic trajectory. If the container is dropped in free fall, the water flow will: a) diminish b) stop altogether c) go out in a straight line d) curve upward

13 Cola Question 10.6 The Falling Bucket When a hole is made in the side of a cola can holding water, water flows out and follows a parabolic trajectory. If the container is dropped in free fall, the water flow will: a) diminish b) stop altogether c) go out in a straight line d) curve upward Water flows out of the hole because the water pressure inside is larger than the air pressure outside. The water pressure is due to the weight of the water. When the can is in free fall, the water is weightless, so the water pressure is zero, and hence no water is pushed out of the hole!

14 Question 10.7 When you drink liquid through a straw, which of the items listed below is primarily responsible for this to work? The Straw I a) water pressure b) gravity c) inertia d) atmospheric pressure e) mass

15 Question 10.7 When you drink liquid through a straw, which of the items listed below is primarily responsible for this to work? The Straw I a) water pressure b) gravity c) inertia d) atmospheric pressure e) mass When you suck on a straw, you expand your lungs, which reduces the air pressure inside your mouth to less than atmospheric pressure. Then the atmospheric pressure pushing on the liquid in the glass provides a net upward force on the liquid in the straw sufficient to push the liquid up the straw. Follow-up: Is it possible to sip liquid through a straw on the Moon?

16 Question 10.8 The Straw II You put a straw into a glass of water, place your finger over the top so no air can get in or out, and then lift the straw from the liquid. You find that the straw retains some liquid. How does the air pressure P in the upper part compare to atmospheric pressure P A? a) greater than P A b) equal to P A c) less than P A

17 Question 10.8 The Straw II You put a straw into a glass of water, place your finger over the top so no air can get in or out, and then lift the straw from the liquid. You find that the straw retains some liquid. How does the air pressure P in the upper part compare to atmospheric pressure P A? a) greater than P A b) equal to P A c) less than P A Consider the forces acting at the bottom of the straw: P A P r g H = 0 This point is in equilibrium, so net force is zero. Thus, P = P A r g H and so we see that the pressure P inside the straw must be less than the outside pressure P A. H

18 Question 10.9 The Straw III In a mercury barometer at atmospheric pressure, the height of the column of mercury in a glass tube is 760 mm. If another mercury barometer is used that has a tube of larger diameter, how high will the column of mercury be in this case? a) greater than 760 mm b) less than 760 mm c) equal to 760 mm

19 Question 10.9 The Straw III In a mercury barometer at atmospheric pressure, the height of the column of mercury in a glass tube is 760 mm. If another mercury barometer is used that has a tube of larger diameter, how high will the column of mercury be in this case? a) greater than 760 mm b) less than 760 mm c) equal to 760 mm While the weight of the liquid in the tube has increased (volume = height area) due to the larger area of the tube, the net upward force on the mercury (force = pressure area) has also increased by the same amount! Thus, as long as the pressure is the same, the height of the mercury will be the same.

20 Question Two Bricks Imagine holding two identical bricks in place underwater. Brick 1 is just beneath the surface of the water, and brick 2 is held about 2 feet down. The force needed to hold brick 2 in place is: a) greater b) the same c) smaller 1 2

21 Question Two Bricks Imagine holding two identical bricks in place underwater. Brick 1 is just beneath the surface of the water, and brick 2 is held about 2 feet down. The force needed to hold brick 2 in place is: a) greater b) the same c) smaller The force needed to hold the brick in place underwater is W F B. According to Archimedes Principle, F B is equal to the weight of the fluid displaced. Because each brick displaces the same amount of fluid, then F B is the same in both cases. 1 2

22 Question Cylinder and Pail I An aluminum cylinder and a pail together weigh 29 N, as read on a scale. With the cylinder submerged, the scale reads 20 N. If the displaced water is poured into the pail, what will the scale read? a) less than 20 N b) 20 N c) between 20 N and 29 N d) 29 N e) greater than 29 N

23 Question Cylinder and Pail I An aluminum cylinder and a pail together weigh 29 N, as read on a scale. With the cylinder submerged, the scale reads 20 N. If the displaced water is poured into the pail, what will the scale read? a) less than 20 N b) 20 N c) between 20 N and 29 N d) 29 N e) greater than 29 N The buoyant force is equal to the weight of the displaced fluid. Thus, the reduction in the apparent weight of the cylinder when it is submerged is exactly equal to the weight of the water that overflowed. When that water is poured back into the pail, the total weight returns to its original value of 29 N.

24 Question Cylinder and Pail II When the cylinder is lowered into the water, how will the scale readings for the cylinder and the water change? a) cylinder s scale will decrease, but water s scale will increase b) cylinder s scale will increase, but water s scale will decrease c) cylinder s scale will decrease, but water s scale will not change d) both scales will decrease e) both scales will increase

25 Question Cylinder and Pail II When the cylinder is lowered into the water, how will the scale readings for the cylinder and the water change? a) cylinder s scale will decrease, but water s scale will increase b) cylinder s scale will increase, but water s scale will decrease c) cylinder s scale will decrease, but water s scale will not change d) both scales will decrease e) both scales will increase The buoyant force of the water on the cylinder is an upward force that reduces the apparent weight as read on the scale. However, by Newton s Third Law, there is an equal and opposite reaction force. So, if the water pushes up on the cylinder, then the cylinder must push down on the water, thus increasing the scale reading of the water.

26 Question On Golden Pond A boat carrying a large chunk of steel is floating on a lake. The chunk is then thrown overboard and sinks. What happens to the water level in the lake (with respect to the shore)? a) rises b) drops c) remains the same d) depends on the size of the steel

27 Question On Golden Pond A boat carrying a large chunk of steel is floating on a lake. The chunk is then thrown overboard and sinks. What happens to the water level in the lake (with respect to the shore)? a) rises b) drops c) remains the same d) depends on the size of the steel Initially the chunk of steel floats by sitting in the boat. The buoyant force is equal to the weight of the steel, and this will require a lot of displaced water to equal the weight of the steel. When thrown overboard, the steel sinks and only displaces its volume in water. This is not so much water certainly less than before and so the water level in the lake will drop.

28 Question Archimedes I An object floats in water with ¾ of its volume submerged. What is the ratio of the density of the object to that of water? a) ¼ b) 1 / 3 c) 4 / 3 d) ¾ e) 2 / 1

29 Question Archimedes I An object floats in water with ¾ of its volume submerged. What is the ratio of the density of the object to that of water? a) ¼ b) 1 / 3 c) 4 / 3 d) ¾ e) 2 / 1 Remember that we have: V V fluid object so if the ratio of the volume of the displaced water to the volume of the 3 object is, the object has 4 density of water. r r object fluid 3 4 the

30 Question Archimedes II The object is now placed in oil with a density half that of water. What happens? a) it floats just as before b) it floats higher in the water c) it floats lower in the water d) it sinks to the bottom

31 Question Archimedes II The object is now placed in oil with a density half that of water. What happens? a) it floats just as before b) it floats higher in the water c) it floats lower in the water d) it sinks to the bottom We know from before that the object has 3 4 the density of water. If the water is now replaced with oil, which has the density of water, the density of the object is larger than the density of the oil. Therefore, it must sink to the bottom. 1 2

32 Question Archimedes III An object floats in water with ¾ of its volume submerged. When more water is poured on top of the water, the object will: a) move up slightly b) stay at the same place c) move down slightly d) sink to the bottom e) float to the top

33 Question An object floats in water with ¾ of its volume submerged. When more water is poured on top of the water, the object will: Archimedes III a) move up slightly b) stay at the same place c) move down slightly d) sink to the bottom e) float to the top We already know that density of the object is of the density of water, so it floats in water (i.e., the buoyant force is greater than its weight). When covered by more water, it must therefore float to the top. 3 4

34 Question Archimedes IV An object floats in water with 3 4 of its volume submerged. When oil is poured on top of the water, the object will: a) move up slightly b) stay at the same place c) move down slightly d) sink to the bottom e) float to the top

35 Question Archimedes IV An object floats in water with 3 4 of its volume submerged. When oil is poured on top of the water, the object will: a) move up slightly b) stay at the same place c) move down slightly d) sink to the bottom e) float to the top With the oil on top of the water, there is an additional buoyant force on the object equal to the weight of the displaced oil. The effect of this extra force is to move the object upward slightly, although it is not enough to make the object float up to the top.

36 Question Helium Balloon I A helium balloon in an air-filled glass jar floats to the top. If the air is replaced with helium, what will happen to the helium balloon? a) it still floats at the top because it has positive buoyancy b) it stays in the middle because it has neutral buoyancy c) it sinks to the bottom because it has negative buoyancy d) the balloon shrinks in size due to the surrounding helium e) the balloon grows in size due to the lack of surrounding air

37 Question Helium Balloon I A helium balloon in an air-filled glass jar floats to the top. If the air is replaced with helium, what will happen to the helium balloon? a) it still floats at the top because it has positive buoyancy b) it stays in the middle because it has neutral buoyancy c) it sinks to the bottom because it has negative buoyancy d) the balloon shrinks in size due to the surrounding helium d) the balloon grows in size due to the lack of surrounding air The balloon floats initially because the displaced air weighs more than the balloon, so the buoyant force provides a net upward force. When the balloon is in the lighter helium gas (instead of air), the displaced helium gas does not provide enough of an upward buoyant force to support the weight of the balloon.

38 Question Helium Balloon II Now the jar is lifted off the table, but the jar remains inverted to keep the helium gas in the jar. What will happen to the balloon? a) it floats at the top of the jar b) it floats at the bottom of the jar, but still fully inside the jar c) it floats below the bottom of the jar, sticking halfway out the bottom d) it sinks down to the surface of the table

39 Question Helium Balloon II Now the jar is lifted off the table, but the jar remains inverted to keep the helium gas in the jar. What will happen to the balloon? a) it floats at the top of the jar b) it floats at the bottom of the jar, but still fully inside the jar c) it floats below the bottom of the jar, sticking halfway out the bottom d) it sinks down to the surface of the table The balloon sinks in the helium gas (fluid #1) until it hits the surface of the air (fluid #2). Because the balloon floats in air, it will float on the surface of the air and therefore remain inside the jar, but at the bottom.

40 Question Wood in Water I Two beakers are filled to the brim with water. A wooden block is placed in the beaker 2 so it floats. (Some of the water will overflow the beaker). Both beakers are then weighed. Which scale reads a larger weight? same for both

41 Question Wood in Water I Two beakers are filled to the brim with water. A wooden block is placed in the beaker 2 so it floats. (Some of the water will overflow the beaker). Both beakers are then weighed. Which scale reads a larger weight? The block in 2 displaces an amount of water equal to its weight, because it is floating. That means that the weight of the overflowed water is equal to the weight of the block, and so the beaker in 2 has the same weight as that in 1. same for both

42 Question Wood in Water II A block of wood floats in a container of water as shown on the right. On the Moon, how would the same block of wood float in the container of water? Earth Moon

43 Question Wood in Water II A block of wood floats in a container of water as shown on the right. On the Moon, how would the same block of wood float in the container of water? Earth A floating object displaces a weight of water equal to the object s weight. On the Moon, the wooden block has less weight, but the water itself also Moon has less weight.

44 Question Fluid Flow Water flows through a 1-cm diameter pipe connected to a ½-cm diameter pipe. Compared to the speed of the water in the 1-cm pipe, the speed in the ½ -cm pipe is: a) one-quarter b) one-half c) the same d) double e) four times

45 Question Fluid Flow Water flows through a 1-cm diameter pipe connected to a ½-cm diameter pipe. Compared to the speed of the water in the 1-cm pipe, the speed in the ½ -cm pipe is: a) one-quarter b) one-half c) the same d) double e) four times v 1 v2 The area of the small pipe is less, so we know that the water will flow faster there. Because A r 2, when the radius is reduced by one-half, the area is reduced by one-quarter, so the speed must increase by four times to keep the flow rate (A v) constant.

46 Question Blood Pressure I A blood platelet drifts along with the flow of blood through an artery that is partially blocked. As the platelet moves from the wide region into the narrow region, the blood pressure: a) increases b) decreases c) stays the same d) drops to zero

47 Question Blood Pressure I A blood platelet drifts along with the flow of blood through an artery that is partially blocked. As the platelet moves from the wide region into the narrow region, the blood pressure: a) increases b) decreases c) stays the same d) drops to zero The speed increases in the narrow part, according to the continuity equation. Because the speed is higher, the pressure is lower, from Bernoulli s principle. speed is higher here (so pressure is lower)

48 Question Blood Pressure II A person s blood pressure is generally measured on the arm, at approximately the same level as the heart. How would the results differ if the measurement were made on the person s leg instead? a) blood pressure would be lower b) blood pressure would not change c) blood pressure would be higher

49 Question Blood Pressure II A person s blood pressure is generally measured on the arm, at approximately the same level as the heart. How would the results differ if the measurement were made on the person s leg instead? a) blood pressure would be lower b) blood pressure would not change c) blood pressure would be higher Assuming that the flow speed of the blood does not change, then Bernoulli s equation indicates that at a lower height, the pressure will be greater.

50 Question The Chimney How is the smoke drawn up a chimney affected when there is a wind blowing outside? a) smoke rises more rapidly in the chimney b) smoke is unaffected by the wind blowing c) smoke rises more slowly in the chimney d) smoke is forced back down the chimney

51 Question The Chimney How is the smoke drawn up a chimney affected when there is a wind blowing outside? a) smoke rises more rapidly in the chimney b) smoke is unaffected by the wind blowing c) smoke rises more slowly in the chimney d) smoke is forced back down the chimney Due to the speed of the wind at the top of the chimney, there is a relatively lower pressure up there as compared to the bottom. Thus, the smoke is actually drawn up the chimney more rapidly, due to this pressure difference.

Why Study Fluids? Solids and How They Respond to Forces. Solids and How They Respond to Forces. Crystal lattice structure:

States of Matter Gas In a gas, the molecules are far apart and the forces between them are very small Solid In a solid, the molecules are very close together, and the form of the solid depends on the details

Buoyancy and Archimedes Principle. Buoyancy and Archimedes Principle Assume block is in equilibrium.

Assume block is in equilibrium. Then upward forces must equal downward forces. Upward force: pressure from fluid Downward force: atmospheric pressure plus weight Therefore In this case, the object is less

Chapter 9: The Behavior of Fluids

Chapter 9: The Behavior of Fluids 1. Archimedes Principle states that A. the pressure in a fluid is directly related to the depth below the surface of the fluid. B. an object immersed in a fluid is buoyed

Concept Questions Archimedes Principle. 8.01t Nov 24, 2004

Concept Questions Archimedes Principle 8.01t Nov 24, 2004 Pascal s Law Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel

Write True or False in the space provided.

CP Physics -- Exam #7 Practice Name: _ Class: Date: Write True or False in the space provided. 1) Pressure at the bottom of a lake depends on the weight density of the lake water and on the volume of the

Archimedes. F b (Buoyant Force) DEMO. Identical Size Boxes Which has larger F B. Which is heavier. styrofoam (1 cm 3 ) steel ( 1 cm 3 )

Fluids Density 1 F b (Buoyant Force) DEMO Archimedes Identical Size Boxes Which has larger F B Which is heavier styrofoam (1 cm 3 ) steel ( 1 cm 3 ) steel ( 1 cm 3 ) styrofoam (1 cm 3 ) 2 Finding the Weight

Fluids: Liquids & Gases

Chapter 7: Fluids Fluids: Liquids & Gases Fluids are substances that are free to flow. Atoms and molecules are free to move. They take the shape of their containers. Cannot withstand or exert shearing

Density. Density is how concentrated or compact matter is.

Density Density is how concentrated or compact matter is. Packing snow into snowballs increases its density. You are squeezing large amounts of matter into small volumes of space. Equation for Density

Fluids: Liquids vs. Gases

FLUID MECHANICS Fluids: Liquids vs. Gases Chemical bonds can break when heated Leaving individual molecules free to roam randomly Liquids: Volume held constant due to surface tension So density (mass /

Chapter 13: LIQUIDS. Lecture Part 1-2. Armen Kocharian Pearson Education, Inc.

Chapter 13: LIQUIDS Lecture Part 1-2 Armen Kocharian Objectives: Pressure Pressure in a Liquid Buoyancy in a Liquid Archimedes Principle What Makes an Object Sink or Float The force per unit area that

Described by Isaac Newton

Described by Isaac Newton States observed relationships between motion and forces 3 statements cover aspects of motion for single objects and for objects interacting with another object An object at rest

Lecture 13 Mass Density (Chapter 12) Pressure Buoyant Force

Lecture 13 Mass Density (Chapter 12) Pressure Buoyant Force (Chap. 13) Density The (mass) density of a material is its mass M per unit volume V: The densities of most liquids and solids vary slightly with

Rank in order, from largest to smallest, the magnitudes of the 3 forces required to balance the masses in the Figure. The masses are in kilograms.

Rank in order, from largest to smallest, the magnitudes of the 3 forces required to balance the masses in the Figure. The masses are in kilograms. A. F 1 = F 2 = F 3 B. F 3 > F 2 > F 1 C. F 3 > F 1 > F

a) the object's density. c) the submerged volume of the object. b) the mass of the object. d) the shape of the object.

Multiple Choice Questions ( Buoyant force and floatability) 1. The buoyant force on an object is dependent on a) the object's density. c) the submerged volume of the object. b) the mass of the object.

Chapter 13 Fluids. Copyright 2009 Pearson Education, Inc.

Chapter 13 Fluids 13-1 Phases of Matter The three common phases of matter are solid, liquid, and gas. A solid has a definite shape and size. A liquid has a fixed volume but can be any shape. A gas can

Buoyant Force and Archimedes' Principle

Buoyant Force and Archimedes' Principle Introduction: Buoyant forces keep Supertankers from sinking and party balloons floating. An object that is more dense than a liquid will sink in that liquid. If

Section 2 Buoyancy and Density

Section 2 Buoyancy and Density Key Concept Buoyant force and density affect whether an object will float or sink in a fluid. What You Will Learn All fluids exert an upward buoyant force on objects in the

Physics 11 (Fall 2012) Chapter 13: Fluids

Physics 11 (Fall 2012) Chapter 13: Fluids "Keep in mind that neither success nor failure is ever final." Roger Ward Babson Our greatest glory is not in never failing, but in rising up every time we fail.

Forces in Fluids. Objectives Describe how fluids exert pressure. Explain the relationship between fluid pressure and buoyant force.

Forces in Fluids Objectives Describe how fluids exert pressure. Explain the relationship between fluid pressure and buoyant force. Describe the relationship between pressure and fluid speed. I. Fluids

oil liquid water water liquid Answer, Key Homework 2 David McIntyre 1

Answer, Key Homework 2 David McIntyre 1 This print-out should have 14 questions, check that it is complete. Multiple-choice questions may continue on the next column or page: find all choices before making

Buoyant Force and Archimedes Principle

Buoyant Force and Archimedes Principle Predict the behavior of fluids as a result of properties including viscosity and density Demonstrate why objects sink or float Apply Archimedes Principle by measuring

Name Date Class. The Nature of Force and Motion (pages ) 2. When one object pushes or pulls another object, the first object is

CHAPTER 4 MOTION AND FORCES SECTION 4 1 The Nature of Force and Motion (pages 116-121) This section explains how balanced and unbalanced forces are related to the motion of an object. It also explains

17.3 Buoyancy of Fluids

Have you ever noticed how easy it is to do a push-up to lift yourself up and out of a swimming pool? It s much easier than doing push-ups on land. That s because the water is exerting an upward force on

Grade 8 Science Chapter 9 Notes

Grade 8 Science Chapter 9 Notes Force Force - Anything that causes a change in the motion of an object. - usually a push or a pull. - the unit for force is the Newton (N). Balanced Forces - forces that

Density. Part 1: What is Density?

Density Part 1: What is Density? Starter Activity Which is heavier, steel or wood? Density We can use a number to describe how heavy something is for its size. Density is the mass per unit of volume. To

13.3 Buoyancy. Buoyant Force

The forces from pressure acting on the bottom of this golf ball are greater than those on the top. This produces a net force called the buoyant force that acts upward on the ball. Buoyant Force What is

F mg (10.1 kg)(9.80 m/s ) m

Week 9 homework IMPORTANT NOTE ABOUT WEBASSIGN: In the WebAssign versions of these problems, various details have been changed, so that the answers will come out differently. The method to find the solution

Pressure. Pressure is one of those words we frequently use, perhaps knowing intuitively what it means. In science, we define pressure as follows:

Weather reports in the media provide information on variables such as temperature, precipitation and wind speed. In this chapter, we discuss three physical quantities that help determine weather: (1) Temperature,

AP2 Fluids. Kinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same

A cart full of water travels horizontally on a frictionless track with initial velocity v. As shown in the diagram, in the back wall of the cart there is a small opening near the bottom of the wall that

Pascal s Principle. Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid.

Pascal s Principle What happens inside a fluid when pressure is exerted on it? Does pressure have a direction? Does it transmit a force to the walls or bottom of a container? Any change in the pressure

Archimedes Principle. Biological Systems

Archimedes Principle Introduction Many of the substances we encounter in our every day lives do not have rigid structure or form. Such substances are called fluids and can be divided into two categories:

Making Things Float & Making a Hydrometer

Making Things Float & Making a Hydrometer Grade 7 Activity Plan 1 Making Things Float Objectives: 1. To demonstrate how density and displacement affect whether things float or sink 2. To illustrate how

Fluids flow conform to shape of container. Mass: mass density, Forces: Pressure Statics: Human body 50-75% water, live in a fluid (air)

Chapter 11 - Fluids Fluids flow conform to shape of container liquids OR gas Mass: mass density, Forces: Pressure Statics: pressure, buoyant force Dynamics: motion speed, energy friction: viscosity Human

Lab 8: Buoyancy and Archimedes Principle

Description Lab 8: Buoyancy and Archimedes Principle In this lab, you will explore the force that displacing a fluid (liquid or gas) will exert on the body displacing the fluid. You will study how the

Figure 1: The Net Force of the Fluid Acting on an Object Is the Buoyant Force

Buoyancy, Stability, and Ballast 1 Cornerstone Electronics Technology and Robotics III (Notes primarily from Underwater Robotics Science Design and Fabrication, an excellent book for the design, fabrication,

Physics 1114: Unit 6 Homework: Answers

Physics 1114: Unit 6 Homework: Answers Problem set 1 1. A rod 4.2 m long and 0.50 cm 2 in cross-sectional area is stretched 0.20 cm under a tension of 12,000 N. a) The stress is the Force (1.2 10 4 N)

Fluids I. Level : Conceptual Physics/Physics I. Q1) Order the following materials from lowest to greatest according to their densities.

Fluids I Level : Conceptual Physics/Physics I Teacher : Kim 1. Density One of the properties of any substances (solids, liquids and gases) is the measure of how tightly the material is packed together.

CHAPTER 3: FORCES AND PRESSURE

CHAPTER 3: FORCES AND PRESSURE 3.1 UNDERSTANDING PRESSURE 1. The pressure acting on a surface is defined as.. force per unit. area on the surface. 2. Pressure, P = F A 3. Unit for pressure is. Nm -2 or

Name Class Date. F 2 2269 N A 1 88.12 cm 2 A 2 1221 cm 2 Unknown: Step 2: Write the equations for Pascal s principle and pressure, force, and area.

Skills Worksheet Math Skills Pascal s Principle After you study each sample problem and solution, work out the practice problems on a separate sheet of paper. Write your answers in the spaces provided.

Physics 123 Fluid Mechanics Review

Physics 123 Fluid Mechanics Review I. Definitions & Facts Density Specific gravity (= D material / D water ) Pressure Atmosphere, bar, Pascal Streamline, laminar flow Gauge pressure Turbulence Density

Chapter 13 - Fluids w./ QuickCheck Questions

Chapter 13 - Fluids w./ QuickCheck Questions 2015 Pearson Education, Inc. Anastasia Ierides Department of Physics and Astronomy University of New Mexico November 12, 2015 Review of Last Time Energy transformations

Buoyancy Problem Set

Buoyancy Problem Set 1) A stone weighs 105 lb in air. When submerged in water, it weighs 67.0 lb. Find the volume and specific gravity of the stone. (Specific gravity of an object: ratio object density

Chapter 8 Fluid Flow

Chapter 8 Fluid Flow GOALS When you have mastered the contents of this chapter, you will be able to achieve the following goals: Definitions Define each of the following terms, and use it in an operational

Fluids I. Density is a measure of how much matter is squeezed into a given space, that is, the amount of mass per unit volume.

Fluids I Level : Conceptual Physics Teacher : Kim 1. Density One of the properties of any substances (solids, liquids and gases) is the measure of how tightly the material is packed together. This property

Assignment 1 SOLUTIONS

Assignment 1 SOLUTIONS 1. 18k Gold The overall density is the total mass divided by the total volume, so let s think about the volume fo 1 gram of 18k gold, which I ll call V 1g 18k. The volume 1 gm of

Pressure In A Fluid. GE Define fluid in your own words. 2. Is a liquid a fluid? Is a gas a fluid? Explain your reasoning.

HPP Activity 38v1 Pressure In A Fluid Note that this unit contains the word "fluid" in the title. Let us carry on by examining the relationship between pressure and fluids. Exploration GE 1. 1. Define

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Sample Mid-Term 2 Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two life preservers have identical volumes, but one is filled with styrofoam

Three Methods for Calculating the Buoyant Force Gleue: Physics

Three Methods for Calculating the Buoyant Force Gleue: Physics Name Hr. The Buoyant Force (F b ) is the apparent loss of weight for an object submerged in a fluid. For example if you have an object immersed

Worksheet for Exploration 14.1: Floating and Density

Worksheet for Exploration 14.1: Floating and Density How can a boat made out of a material more dense than water float? The block has a mass of 0.185 kg (position is given in centimeters). If this block

Chapter 3 Student Reading If you hold a solid piece of lead or iron in your hand, it feels heavy for its size. If you hold the same size piece of balsa wood or plastic, it feels light for its size. The

Density and Buoyant Force

Density_and_Buoyant_Force_6c.docx Density and Buoyant Force An exploration of the relationships between weight, density, and buoyant force. 1.1 EXPERIMENTAL GOAL 1 OBJECTIVES Students will use Archimedes'

Chapter 13 - Solutions

= Chapter 13 - Solutions Description: Find the weight of a cylindrical iron rod given its area and length and the density of iron. Part A On a part-time job you are asked to bring a cylindrical iron rod

Density (r) Chapter 10 Fluids. Pressure 1/13/2015

1/13/015 Density (r) Chapter 10 Fluids r = mass/volume Rho ( r) Greek letter for density Units - kg/m 3 Specific Gravity = Density of substance Density of water (4 o C) Unitless ratio Ex: Lead has a sp.

Archimedes Principle

rev 12/2016 Archimedes Principle Equipment Qty Item Parts Number 1 Force Sensor, Economy CI-6746 1 Lab Jack SE-9373 1 Beaker SE-7288 1 250 ml Graduated Cylinder 1 Large Rod ME-8738 1 Small Rod ME-8988

Molecules in a Liquid

LIQUIDS Molecules in a Liquid Chemical bonds can break when heated Leaving individual molecules free to roam Liquids: no large-scale structure Molecules roughly confined by a crowd of other molecules Molecules

SURFACE TENSION. Definition

SURFACE TENSION Definition In the fall a fisherman s boat is often surrounded by fallen leaves that are lying on the water. The boat floats, because it is partially immersed in the water and the resulting

Applied Fluid Mechanics

Applied Fluid Mechanics 1. The Nature of Fluid and the Study of Fluid Mechanics 2. Viscosity of Fluid 3. Pressure Measurement 4. Forces Due to Static Fluid 6. Flow of Fluid and Bernoulli s Equation 7.

LAB #2: Forces in Fluids

Princeton University Physics 103/105 Lab Physics Department LAB #2: Forces in Fluids Please do NOT attempt to wash the graduated cylinders once they have oil in them. Don t pour the oil in the graduated

CALA. 125 Lilian Dr., Toronto, ON M1R 3W6. Tel: (416) Fax: (416)

LAND BASED TRAINING On land there are two forces which together produce human movement: the force produced by a muscular contraction and the force of gravity. Muscular contractions, regardless of where

4 TH GRADE AIR AND AIR PRESSURE

4 TH GRADE AIR AND AIR PRESSURE Summary: Students experiment with air by finding that it has mass and pressure. Warm air is less dense than cool air and this is tested using a balance. Students experiment

Physics 2101 S c e t c i cti n o 3 n 3 March 26th Announcements: Next Quiz on Next Quiz April

Physics 2101 Section 3 March 26 th Announcements: Next Quiz on April 1 st Don t forget supl. HW #9 Cha. 14 today Class Website: http://www.phys.lsu.edu/classes/spring2010/phys2101-3/ http://www.phys.lsu.edu/~jzhang/teaching.html

Physics 103 CQZ1 Solutions and Explanations. 1. All fluids are: A. gases. B. liquids. C. gases or liquids. D. non-metallic. E.

Physics 03 CQZ Solutions and Explanations. All fluids are: A. gases B. liquids C. gases or liquids D. non-metallic E. transparent Matter is classified as solid, liquid, gas, and plasma. Gases adjust volume

Chapter 3. Table of Contents. Chapter 3. Objectives. Chapter 3. Kinetic Theory. Section 1 Matter and Energy. Section 2 Fluids

States of Matter Table of Contents Objectives Summarize the main points of the kinetic theory of matter. Describe how temperature relates to kinetic energy. Describe four common states of matter. List

Matter and the Universe. Ancient Views. Modern Views. Periodic Table of Elements. Ernest Rutherford

Matter and the Universe Ancient Views Early atomists believed that matter had a smallest indivisible bit, an atom. Aristotle, the most famous of the early Greek philosophers, didn't agree with the idea

Lesson 2 The Buoyant Force

Lesson 2 Student Labs and Activities Page Launch Lab 26 Content Vocabulary 27 Lesson Outline 28 MiniLab 30 Content Practice A 31 Content Practice B 32 School to Home 33 Key Concept Builders 34 Enrichment

Buoyancy Test ProblagBL-^

Buoyancy Test ProblagBL-^ (Fill in the brackets with: "is than," "is less than," or "."). 1. Three balls having the same volume are put into kerosene. Call the buoyancy exerted on each ball Fa, Fb, and

Density and Archimedes Principle

Density and Archimedes Principle Objectives: To understand the concept of density and its relationship to various materials. To understand and use Archimedes Principle. Equipment: Dial calipers, Graduated

CONVECTION. cold water (red)

CONVECTION Name(s) PART 1 Convection and Density The physical world around us is constantly changing. The activities in this section of the unit will introduce a new model (convection) which is very powerful

Lab 11 Density and Buoyancy

b Lab 11 Density and uoyancy What You Need To Know: Density A concept that you will be using frequently in today s lab is called density. Density is a measurement of an object s mass per unit volume of

Lab 9. Archimedes Principle and Applications. Upon successful completion of this exercise you will have...

Lab 9 Archimedes Principle and Applications Objectives: Upon successful completion of this exercise you will have... 1.... utilized Archimedes principle to determine the density and specific gravity of

General Physics (PHY 2130)

General Physics (PHY 30) Lecture 3 Solids and fluids buoyant force Archimedes principle Fluids in motion http://www.physics.wayne.edu/~apetrov/phy30/ Lightning Review Last lecture:. Solids and fluids different

Student Exploration: Archimedes Principle

Name: Date: Student Exploration: Archimedes Principle Vocabulary: Archimedes principle, buoyant force, density, displace, mass, volume, weight Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

2 Floating and Sinking

Section 2 Floating and Sinking 2 Floating and Sinking Objectives After this lesson, students will be able to M.3.2.1 Describe the effect of the buoyant force. M.3.2.2 Explain how the density of an object

Fluids and Forces FYI

Objectives Fluids and Forces Describe how fluids exert pressure. Analyze how atmospheric pressure varies with depth. Explain how depth and density affect water pressure. Give examples of fluids flowing

Mass, Volume and Density

Mass, Volume and Density An integrated Science and Mathematics Exploration Activity 1 Exploring Volume Materials: Set of 6 jars (labelled A-F) of same size A B C D E F Weighing scales Tape measure Ruler

Density and Archimedes Principle

Density and Archimedes Principle Objectives: To understand the concept of density and its relationship to various materials. To understand and use Archimedes Principle. Equipment: Dial calipers, Graduated

Processes of Science: Physics of Matter. Introduction to Buoyancy

Processes of Science: Physics of Matter Introduction to Buoyancy Introduction: You already know that it's easier to lift something heavy when it's underwater. Why is this? Because the water helps support

Lift vs. Gravity Questions:

LIFT vs GRAVITY Sir Isaac Newton, an English scientist, observed the force of gravity when he was sitting under a tree and an apple fell on his head! It is a strong force that pulls everything down toward

Chapter 15. FLUIDS. 15.1. What volume does 0.4 kg of alcohol occupy? What is the weight of this volume? m m 0.4 kg. ρ = = ; ρ = 5.

Chapter 15. FLUIDS Density 15.1. What volume does 0.4 kg of alcohol occupy? What is the weight of this volume? m m 0.4 kg ρ = ; = = ; = 5.06 x 10-4 m ρ 790 kg/m W = D = ρg = 790 kg/m )(9.8 m/s )(5.06 x

Typhoon Haiyan 1. Force of wind blowing against vertical structure. 2. Destructive Pressure exerted on Buildings

Typhoon Haiyan 1. Force of wind blowing against vertical structure 2. Destructive Pressure exerted on Buildings 3. Atmospheric Pressure variation driving the Typhoon s winds 4. Energy of Typhoon 5. Height

Solution: The boat sinks until the weight of the additional water displaced equals the weight of the truck. Thus,

Problem1. A small ferry boat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.00 cm into the river. What is the weight of the truck? Solution: The boat

Review Chapter 10, 12, 13, 14, 15, 16. Conceptual Physics, 10e (Hewitt) Chapter 10

Review Chapter 10, 12, 13, 14, 15, 16 Conceptual Physics, 10e (Hewitt) Chapter 10 23) What prevents satellites such as a space shuttle from falling? A) gravity B) the absence of air drag C) Nothing; they're

Laboratory 11. Fluid Statics, Pressure, and Buoyant Forces

Laboratory 11 Fluid Statics, Pressure, and Buoyant Forces I. Introduction In this exercise we will investigate some properties of non-moving fluids and the forces they exert on objects immersed in them.

Simulating Microgravity with Buoyancy A Space School Lesson Plan

ASTRONAUT TRAINING...UNDERWATER Simulating Microgravity with Buoyancy A Space School Lesson Plan by Bill Andrake, Swampscott Middle School Swampscott, Massachusetts Science Lesson: Buoyancy - Based on

Scientist Badge Pack Holiday 1997 Topics Floating and Sinking Movement and Mechanics The Natural World Light Electricity and Magnets Materials needed for Floating and Sinking. Floating and Sinking Bowls.

PSI Algebra Based Physics Fluids Multiple Choice Problems

PSI Algebra Based Physics Fluids Multiple Choice Problems 1. Two substances A with a density 2000 kg/m 3 and B with a density 3000 kg/m 3 are selected for an experiment. If the experiment requires equal

Archimedes' Principle

Archimedes' Principle Introduction Archimedes' Principle states that the upward buoyant force exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the

Phys214 exam#2 (30 problems in total. 5 points each, total 150 points. )

Phys214 exam#2 (30 problems in total. 5 points each, total 150 points. ) 1. An oil tanker heading due west, straight into a strong wind, reaches a speed of 5 m/s and then shuts down its engines to drift.

Name Partner Date Class

Name Partner Date Class FLUIDS Part 1: Archimedes' Principle Equipment: Dial-O-Gram balance, small beaker (150-250ml), metal specimen, string, calipers. Object: To find the density of an object using Archimedes'

Chapter 14 - Fluids. -Archimedes, On Floating Bodies. David J. Starling Penn State Hazleton PHYS 213. Chapter 14 - Fluids. Objectives (Ch 14)

Any solid lighter than a fluid will, if placed in the fluid, be so far immersed that the weight of the solid will be equal to the weight of the fluid displaced. -Archimedes, On Floating Bodies David J.

Name: Class: Date: Exam 4--PHYS 101--F14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A wheel, initially at rest, rotates with a constant acceleration

SUGGESTED ACTIVITIES

SUGGESTED ACTIVITIES (Observing and Measuring Matter) From Invitations to Science Inquiry 2 nd Edition by Tik L. Liem: Activity Page Number Concept The funny water 122 Density The different clay sticks

Physics Principles of Physics

Physics 1408-002 Principles of Physics Lecture 21 Chapter 13 April 2, 2009 Sung-Won Lee Sungwon.Lee@ttu.edu Announcement I Lecture note is on the web Handout (6 slides/page) http://highenergy.phys.ttu.edu/~slee/1408/

Physics 181- Summer 2011 - Experiment #8 1 Experiment #8, Measurement of Density and Archimedes' Principle

Physics 181- Summer 2011 - Experiment #8 1 Experiment #8, Measurement of Density and Archimedes' Principle 1 Purpose 1. To determine the density of a fluid, such as water, by measurement of its mass when

Newton s Third Law: A Verification with Buoyancy Forces

Newton s Third Law: A Verification with Buoyancy Forces Barry Feierman - April 2013 SEPS/AAPT Drexel University Newton s Third Law is the law of interaction. For every force that acts on one object, there

Physics 113 Exam #4 Angular momentum, static equilibrium, universal gravitation, fluid mechanics, oscillatory motion (first part)

Physics 113 Exam #4 Angular momentum, static equilibrium, universal gravitation, fluid mechanics, oscillatory motion (first part) Answer all questions on this examination. You must show all equations,

Gas Properties and Balloons & Buoyancy SI M Homework Answer K ey

Gas Properties and Balloons & Buoyancy SI M Homework Answer K ey 1) In class, we have been discussing how gases behave and how we observe this behavior in our daily lives. In this homework assignment,