Which of the following is a mechanical wave?
1. Radio waves
2. X-rays
3. Light waves
4. Sound waves

Subtopic:  Types of Waves |
 87%
From NCERT
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Velocity of sound in air is \(332\) m/s. Its velocity in the vacuum will be:
1. \(>332\) m/s
2. \(=332\) m/s
3. \(<332\) m/s
4. meaningless

Subtopic:  Types of Waves |
 62%
From NCERT
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A wave moving in a gas:

1. must be longitudinal
2. may be longitudinal
3. must be transverse
4. may be transverse
Subtopic:  Types of Waves |
 54%
From NCERT
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