Question

1. velocity of sound at zero degree celsius is *

2 points

351 m/s

331 m/s

341 m/s

2. listener moves with constant velocity circular trip with respect to observer *

2 points

no Doppler effect

Doppler effect is maximum

Doppler effect takes the place effectively

3. Humidity is increases velocity of the sound is *

2 points

increases

decreases

zero

4.If the sound is increases each 1°C then velocity of sound is increases by the factor *

2 points

0.91

o. 71

0.61

0.51

5. infrasonic waves are frequencies *

2 points

above 20 kHz

above 20 Hz

below 20 Hz​

Answer 1

Answer:

1. 331 m/s

2.

3. increase