Physics
The speed of light in air is:
- 3 x 108 m s-1
- 330 m s-1
- 5100 m s-1
- 3 x 1010 m s-1
Sound
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Answer
3 x 108 m s-1
Reason — The speed of light in air is 3 x 108 m s-1
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Related Questions
The speed of sound in a gas is related to temperature (in Kelvin) as :
- directly proportional to temperature.
- directly proportional to the square root of temperature.
- inversely prtiportional to temperature.
- inversely proportional to the square root of temperature.
Factors affecting the speed of sound are :
- temperature
- density
- pressure
- only (a) and (b)
What causes sound?
Complete the following sentence —
Sound is produced by a ………. body.