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Physics 1: Unit 7 – Mechanical Waves Answer the following 10 Multiple Choice Questions

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Physics 1: Unit 7 – Mechanical Waves Answer the following 10 Multiple Choice Questions. You DO NOT need to show your work! 1. What is the amplitude of the wave depicted here? Select one: a. 8 b. 6 c. 3 2. How does the frequency of a wave when the source is moving towards the observer compare to the frequency of that source when it is stationary? Select one: a. The frequency is lower. b. The frequency remains the same. c. The frequency is higher. 3. A slinky wave goes from crest to trough and back to crest 50 times in 30 seconds. What is the frequency of the wave in units of Hertz (1/s). Select one: a. 1.7 b. 30 c. 0.6 d. 50 4. What type of interference arises when two waves are out of phase with each other? Select one: a. Destructive interference. b. There will be no interference. c. Constructive interference. 5. What happens to the amplitude of a sound every time the loudness increases by 10 decibels? Select one: a. It gets 10 times bigger. b. It goes up by 10 units. c. It goes up by 2 units. d. It gets 2 times bigger. 6. What happens to the pitch of a sound when the wavelength of the wave decreases? Select one: a. It remains the same. b. It decreases. c. It increases. 7. What is the velocity of a wave with a wavelength of 3.4 m and a frequency of 14 Hz in m/s? Select one: a. 4.1 b. 17.4 c. 47.6 d. 0.24 8. Which wave property is most directly related to the amount of energy the wave is transporting? Select one: a. The speed of the wave. b. The amplitude of the wave. c. The wavelength of the wave. d. The frequency of the wave. 9. The wave shown below is moving to the right. What type of motion would each part of the material that wave is traveling through move as the wave passes? Select one: a. Side to side. b. To the right. c. Up and down. 10. How many units is the wavelength of this wave? Select one: a. 8 b. 2 c. 4