1. Which set of waves shown below is in order from highest to lowest frequency? 1 second. 1 second 1 second. Page 1
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1 North arolina Testing Program EO Physics Sample Items Goal 7 1. Which set of waves shown below is in order from highest to lowest frequency? Page 1
2 North arolina Testing Program EO Physics Sample Items Goal 7 2. What is the period of the wave shown below? 1. sec.1 s.4 s 1. s 2.5 s 3. ssuming the waves all have the same velocity, which wave has the lowest frequency? Page 2
3 North arolina Testing Program EO Physics Sample Items Goal 7 4. What is the period of a wave that has a wavelength of.8 m and is traveling at 2. m/s?.4 s.63 s 4. s 6.3 s 6. physicist measures the speed of an 8 electromagnetic wave as m/s in a medium. What is the index of refraction of the medium? student sits on one side of a door sending a horizontal pulse along a rope that runs under the door. The reflected pulse is inverted. What information can be inferred from this observation? The rope is unattached. The rope is attached to a rigid boundary. 7. In which media would sound waves travel fastest? a vacuum air water glass The rope is attached to a more flexible boundary. The rope is attached to a boundary that has equal rigidity as the rope. Page 3
4 North arolina Testing Program EO Physics Sample Items Goal 7 8. pulse travels from a spring to a thin thread that is attached to a wall. 9. light ray is incident on a plane mirror as shown in this diagram. Light Ray thread ir ir Mirror What is the angle of reflection? Which best describes the pulse in the thread after it leaves the spring at point? The pulse is upright. The pulse is inverted The pulse stops. The pulse is totally reflected with no transmission. Page 4
5 North arolina Testing Program EO Physics Sample Items Goal 7 1. child is playing with a string attached to a doorknob. She sends a series of pulses down the string. ssume that the pulses are reflected with no loss of amplitude. If all the pulses have an amplitude of 15 cm, which best describes what the child sees where an incident pulse and reflected pulse meet? a larger pulse of 3 cm a smaller pulse of 15 cm oth pulses are seen on either side, each with an amplitude of 15 cm. No pulse is seen where the two pulses meet. Page 5
6 North arolina Testing Program EO Physics Sample Items Goal Two wave pulses are traveling on a rope in opposite directions, as shown in the diagrams. The wave pulses have the same length and amplitude. X Y When wave X meets wave Y, what will most likely be the appearance of the resulting pulse? 12. oth constructive and destructive interference are a result of wave superposition. The result of interference can best be described by which statement? the algebraic sum of the individual displacements the algebraic product of the individual displacements the exponential relationship between individual displacements the inverse relationship between individual displacements Page 6
7 North arolina Testing Program EO Physics Sample Items Goal train whistle produces a pitch of 4 Hz when the train is not moving. If an observer is stopped at a railroad crossing and the train passes him at time t, what pitch is heard by the observer? 14. The stars in a galaxy emit light with a wavelength of 3 nm, but this light appears to have a wavelength of 4 nm to an astronomer on Earth. Which describes the motion of the galaxy relative to Earth? away from Earth 4 toward Earth left of Earth t (min) right of Earth End of Goal 7 Sample Items 4 t (min) In compliance with federal law, including the provisions of Title IX of the Education mendments of 1972, the epartment of Public Instruction does not discriminate on the basis of race, sex, religion, color, national or ethnic origin, age, disability, or military service in its policies, programs, activities, admissions or employment. 4 t (min) 4 t (min) Page 7
8 EO Physics Goal 7 Sample Items Key Report 1 Objective: 7.1 nalyze, investigate, and evaluate the relationship among the characteristics of waves: a. Wavelength. b. Frequency. c. Period. d. mplitude. Thinking Skill: Generating orrect nswer: 2 Objective: 7.1 nalyze, investigate, and evaluate the relationship among the characteristics of waves: a. Wavelength. b. Frequency. c. Period. d. mplitude. Thinking Skill: Knowledge orrect nswer: 3 Objective: 7.1 nalyze, investigate, and evaluate the relationship among the characteristics of waves: a. Wavelength. b. Frequency. c. Period. d. mplitude. Thinking Skill: Knowledge orrect nswer: 4 Objective: 7.1 nalyze, investigate, and evaluate the relationship among the characteristics of waves: a. Wavelength. b. Frequency. c. Period. d. mplitude. Thinking Skill: N/ orrect nswer: 5 Objective: 7.2 escribe the behavior of waves in various media. Thinking Skill: Knowledge orrect nswer: 6 Objective: 7.2 escribe the behavior of waves in various media. Thinking Skill: pplying orrect nswer: Page 1 educational purposes only; not for personal or financial gain.
9 EO Physics Goal 7 Sample Items Key Report 7 Objective: 7.2 escribe the behavior of waves in various media. Thinking Skill: Knowledge orrect nswer: 8 Objective: 7.2 escribe the behavior of waves in various media. Thinking Skill: Knowledge orrect nswer: 9 Objective: 7.3 nalyze the behavior of waves at boundaries between media:. Reflection, including the law of reflection.. Refraction, including Snell s law - conceptual.. omputational Snell s law. Thinking Skill: N/ orrect nswer: 1 Objective: 7.4 nalyze the relationship between the phenomena of interference and the principle of superposition. Thinking Skill: Integrating orrect nswer: 11 Objective: 7.4 nalyze the relationship between the phenomena of interference and the principle of superposition. Thinking Skill: Integrating orrect nswer: 12 Objective: 7.4 nalyze the relationship between the phenomena of interference and the principle of superposition. Thinking Skill: Generating orrect nswer: 13 Objective: 7.5 nalyze the frequency and wavelength of sound produced by a moving source (the oppler Effect). Thinking Skill: N/ orrect nswer: 14 Objective: 7.5 nalyze the frequency and wavelength of sound produced by a moving source (the oppler Effect). Thinking Skill: N/ orrect nswer: Page 2 educational purposes only; not for personal or financial gain.
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