Please asnwer all the questions on the picture, just directly answer (without ex

Question

Please asnwer all the questions on the picture, just directly answer (without explanation)is ok

7. Examples of purely longitudinal waves include (may be more than one) a. waves on a string b. sound in air C, water waves d, light waves e, none of these means (may be 8. good approximation sound in air travels adiabatically. This To a more than one) a. the waves travel in all directions equally well b. the frequency does not change c. there is no transfer of heat d, the wave has no mass e. none of these 9. Compared to its frequency in air, the frequency of a sound wave in water is a. higher c, the same d. not enough information to say b. lower 10. The speed of sound increases with increasing (may be more than one) e. none of these a. air temperature C. wave amplitude d. wave frequency b. air density 11. The amount of power in the sound of a person talking loudly is a, much greater than the power used in a flashlight b. approximately the same power used in a flashlight c, much less than the power used in a flashlight d. it depends on what the person is saying 12. The amplitude of a sound wave could be given in terms of (may be more than one) e. none of these a. temperature C. pressure d. distance displacement b. density 13. The Doppler effect is characteristic of (may be more than one) (c) light waves water waves. none of the above choices sound waves

Explanation / Answer

7) sound in air

8) adiabatic means there is no transfer of heat

9) same

10) temperature

11) much greater than

12) pressure and distance displacement
13) sound waves and light waves

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