Question

6. The distance between successive crests on a wave is called the wave's

      a) wavelength.     b) amplitude.      c) speed.          d) frequency.

7. When a sound wave passes from air into water, its _____ is unchanged.

      a) velocity        b) amplitude       c) frequency       d) wavelength

8. You hear a 400 Hz sound from a train whistle traveling away from you at 33.33 m/s. The actual frequency of the whistle is _____ Hz.

      a) 439         b) 365         c) 400         d) 443         e) 361

9-10. You are trapped in a long narrow corridor closed off at both ends. A stereo sound system has set up standing waves with a wavelength of 16 m in the corridor.

9. The smallest possible length of the corridor is _____ m.

      a) 4           b) 16          c) 12          d) 8           e) 32

10. The frequency of this standing wave is _____ Hz.

      a) 43          b) 86          c) 29          d) 21          e) 11

11. Phase changes occur

      a) as the temperature decreases      b) as the temperature increases

      c) as the temperature remains the same      d) all of the above

12. The reason ocean temperatures do not vary drastically is that

      a) water has a relatively high rate of heat conduction      

      b) water is a good radiator      c) water has a relatively high specific heat

     d) water is a poor heat conductor

Answer 1