Physics sound waves multiple choice questions?

Question

1) When sound travels through air, the air particles:
- vibrate along the direction of wave propagation
- vibrate but not in any fixed direction
- vibrate perpendicular to the direction of wave propagation
- do not vibrate

2) A source of frequency of 500 Hz emits waves of wavelength 0.4 m, how long does the waves take to travel 600 m?
- 3 s
- 6 s
- 9 s
- 12 s

3) The loudness of a sound wave is determined by:
- amplitude
- frequency
- period
- wavelength

4) When the frequency of a force applied to a system matches the natural frequency of vibration of the system, ____ occurs.
- pitch
- doppler effect
- timbre
- resonance

Answer 1

1) Sound waves vibrate in the direction of the wave



2) If f = 500 and lambda = 0.4m then v = lambda*f = 0.4*500 = 200m/s so it takes 600/200 = 3s to travel that distance





3) Loudness is determined by amplitude



4) Resonance

Answer 2

1) along the direction

2) 3s

3) amplitude

4) resonance

Answer 3

1/a

2/a

3/a

4d