Answer the Questions:

1. How fast would a wave move on a 50 kg, 20 m cable if the cable experienced a tension force of 500 N?'

a. 10 m/s

b. 200 m/s

c. 14.1 m/s

d. 3.2 m/s

2. A two meter wave trying to pass through an opening that is 2mm in width will experience less diffraction than a one meter wave that tries to pass through the same opening.

a. True

b. False

3. A part of a wave where the displacement is at a minimum value (close to or exactly zero) is called a

a. valley

b. antinode

c. crest

d. node

4. Doppler shifts in frequency only occur when a sound source is moving at a speed greater than 0 m/s.

a. True b. False

5. Mariah Carey famously has a 5-octave range. Suppose that the lowest frequency she can sing is 110 Hz. What is the highest frequency she can sing?

a. 3520 Hz

b. 550 Hz

c. 3200 Hz

d. 1100 Hz

6. If the speed of sound (for normal air) is 335 m/s, what is the temperature of the air in Kelvin?

a. 273 K

b. 17 K

c. 323 K

d. 278 K

7. Interference of waves in a song gives us beats.

a. True

b. False