waves and sound 1. Within a vacuum, the property common to all electromagnetic waves is their A. amplitude B. frequency C. wavelength D.

Transcription

1 Name: ate: 1. Within a vacuum, the property common to all electromagnetic waves is their 1.. amplitude. frequency. wavelength. velocity 2. The diagram shown represents four waves traveling to the right in the same transmitting medium. 2. Which type of wave is represented?. elliptical. longitudinal. torsional. transverse 3. Which wave has the greatest frequency? Which wave has the greatest amplitude? Which characteristic is determined by the source of a wave train and will not change when the wave passes into another medium? 5.. frequency. wavelength. velocity. amplitude 6. Which waves require a medium for transmission? 6.. light waves. radio waves. sound waves. cosmic waves page 1

2 7. Periodic waves are being produced in a ripple tank. s the rate at which the waves are produced is increased, the wavelength of the waves will 7.. decrease. increase. remain the same 8. Which part of the longitudinal waveform shown represents a rarefaction? Which area of the longitudinal waveform area best represents the wavelength of the wave shown? 9.. and. and., only. 10. For a standing wave, the distance between two consecutive minimums (nodes) is equal to wavelength. 2 wavelengths. 1 2 wavelength. 1 4 wavelength 11. The frequency of a wave with a velocity of 30 meters per second and a wavelength of 5.0 meters is waves/sec. 25 waves/sec. 6.0 waves/sec. 5.0 waves/sec 12. In the wave diagram shown, one wavelength is the distance from point to which point? 12.. E What is the velocity of a water wave that travels a distance of 10 meters in 5.0 seconds? m/sec. 2.0 m/sec. 15 m/sec. 50 m/sec page 2

3 14. Which type of wave is classified as longitudinal? 14.. water. radio. sound. light 15. The rate at which a wave travels from one point to another determines the wave s 15.. frequency. period. amplitude. velocity 16. Which is a unit of wavelength? 16.. cycles per second. meters/second. seconds. meters 17. The number of waves passing a point in a unit of time is called 17.. frequency. wavelength. amplitude. period 18. The graph represents the displacement of a point in a medium as a function of time as a wave passes through the medium. What is the frequency of the wave? Hz. 2 Hz. 1 4 Hz. 4 Hz page 3

4 19. The diagram illustrates the wave pattern formed when a stone is dropped into still water. What does the collection of points on the outermost circle represent? 19.. a wave front. a wavelength. the frequency. the period 20. Two pulses are traveling along a string toward each other as represented in the diagram shown. Which phenomenon will occur as the pulses meet 20.. reflection. diffraction. interference. refraction 21. single pulse in a uniform medium transfers 21.. standing waves. energy. mass. wavelength 22. Which characteristic of a wave changes as the wave travels across a boundary between two different media? 22.. frequency. period. phase. speed 23. Which phenomenon must occur when two or more waves pass simultaneously through the same region in a medium? 23.. refraction. interference. dispersion. reflection 24. What is the frequency of a wave if its period is 0.25 seconds? Hz Hz. 12 Hz. 4.0 Hz page 4

5 25. s a periodic wave travels from one medium to another, which pair of the wave s characteristics cannot change? 25.. period and frequency. period and amplitude. frequency and velocity. amplitude and wavelength 26. The diagram pictured shows radar waves being emitted from a stationary police car and reflected by a moving car back to the police car. The difference in apparent frequency between the incident and reflected waves is an example of 26.. constructive interference. refraction. the oppler effect. total internal reflection 27. The diagram shown represents a rope along which two pulses of equal amplitude,, approach point P. When the two pulses meet at P, the vertical displacement of the rope at point P will be Which equation correctly relates the speed v, wavelength λ, and period T of a periodic wave? 28.. v = T λ. v = Tλ. v = λ T. v = λ2 T page 5

6 29. The hertz is a unit that describes the number of 29.. seconds it takes to complete one cycle of a wave. cycles of a wave completed in one second. points that are in phase along one meter of a wave. points that are out of phase along one meter of a wave 30. While sitting in a boat, a fisherman observes that two complete waves pass by his position every 4 seconds. What is the period of these waves? s. 2 s. 8 s. 4 s 31. n echo heard when a person shouts in a canyon is due to the sound waves being 31.. mixed. refracted. diffracted. reflected 32. Two tuning forks are struck at the same time. Their sound is observed to become louder and softer at regular intervals. This is caused by wave 32.. condensation. refraction. interference. amplification 33. The speed of sound in air on a day when the temperature is 20 will be m/sec. 330 m/sec. 344 m/sec. 358 m/sec 34. s the tension in a guitar string is increased, the wavelength of the sound produced will 34.. decrease. increase. remain the same 35. Increasing the amplitude of a sound wave will make it 35.. louder. have a higher pitch. travel faster. produce beats page 6

7 36. When the vibration of one object causes a nearby object to vibrate, the phenomenon is called 36.. reflection. refraction. resonance. diffraction 37. closed pipe 2 meters long will produce a sound wave having a wavelength of m. 2 m. 8 m. 4 m 38. Two tuning forks of 512 vps and 516 vps, respectively, are struck at the same time. The number of beats produced in one second is , In general, compared to the speed of sound through air, the speed of sound through liquids and solids is 39.. slower. faster. the same 40. The tendency of sound waves to bend when they pass from one medium to a different medium is known as 40.. refraction. reflection. resonance. interference 41. ringing electric bell is placed under a bell jar on a vacuum pump and the air is drawn from the space around the ringing bell. s the air is removed, the magnitude of the sound of the bell 41.. decreases. increases. remains the same 42. Sound can not be transmitted through a 42.. gas. liquid. solid. vacuum 43. student blows air across the end of a pipe that is open at both ends. If the wavelength of the note produced was 1.4 meters, what was the length of the pipe? m. 1.4 m m m page 7

8 44. Sound travels as 44.. an electromagnetic wave. a transverse wave. a longitudinal wave. a permanent wave 45. If two identical sound waves arriving at the same point are in phase, the resulting wave will have 45.. an increase in speed. an increase in frequency. a larger amplitude. a longer period 46. The diagram below shows a tuning fork vibrating in air. The dots represent air molecules as the sound wave moves toward the right. 46. Which diagram best represents the direction of motion of the air molecules? The driver of a car blows the horn as the car approaches a crosswalk. ompared to the actual pitch of the horn, the pitch observed by a pedestrian in the crosswalk is 47.. lower. higher. the same page 8

9 48. n opera singer s voice is able to break a thin crystal glass when the singer s voice and the vibrating glass have the same 48.. frequency. speed. amplitude. wavelength 49. s a sound wave passes from water, where the speed is meters per second, into air, the wave s speed 49.. decreases and its frequency remains the same. increases and its frequency remains the same. remains the same and its frequency decreases. remains the same and its frequency increases 50. student in a band notices that a drum vibrates when another instrument emits a certain frequency note. This phenomenon illustrates 50.. reflection. resonance. refraction. diffraction page 9

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