SOUND RT

The temperature at which the speed of sound in air becomes double its value at 0⁰C is

• 1092^OC

• 819 K

• )   819⁰C

• 546⁰C

Doppler’s Effect can be applied to

• Light waves only

• Sound waves only

• Both light and sound waves

• Neither light nor sound waves

The increase in velocity of sound in air in 1^oC rise in temperature is

• 0.61 m/s

• 61 m/s

• 1.61 m/s

• 2 m/s

The relation for the velocity of sound in gas is

Frequencies more than 20,000 Hertz are called

• Ultrasonic

• Supersonics

• Infrasonic

• none of these

Decibel is a

• Musical note

• Musical instrument

• Unit of intensity

• Unit of intensity level

Silence zone is due to

• Constructive interference

• Destructive interference

• Resonance

• Doppler’s Effect

Stars moving away from the Earth show a;

• Blue shift

• Yellow shift

• Red Shift

• Green Shift

It becomes difficult to recognize beats when the difference between the frequencies of two sounds is more than;

• 2 Hz

• 5 Hz   

• 6 Hz

• 10 Hz