Sound

Frequency is expressed in
1. hertz
2. time period
3. sound
4. noise
A pendulum oscillates 40 times in 4 seconds. Find its time period.
1. 0.01s
2. .001s
3. .02s
4. 0.1s
The velocity of sound at 20C is approximately
1. 3400m/s
2. 340m/s
3. 430m/s
4. 304m/s
Vibrations in a body produce
1. sound
2. pressure
3. energy
4. density
Eardrum is a part of
1. hearing organ
2. sound producing organ
3. muscular system
4. air pollution
Unwanted sounds are called
1. noise
2. eardrum
3. music
4. noise pollution
The normal length of vocal cords in man is
1. 30mm
2. 25mm
3. 20mm
4. 35mm
The maximum displacement of a vibrating body on one side is called
1. sound
2. frequency
3. amplitude
4. noise
Sound cannot travel through
1. air
2. water
3. iron
4. vacuum
The maximum displacement of a body from its mean position is called
1. amplitude
2. oscillation
3. periodic motion
4. frequency