Sound waves travel at \(350\) m/s through warm air and at \(3500\) m/s through brass. The wavelength of a \(700\) Hz acoustic wave as it enters brass from warm air:
1. increase by a factor of \(20\).
2. increase by a factor of \(10\).
3. decrease by a factor of \(20\).
4. decrease by a factor of \(10\)
Subtopic:  Speed of Sound |
 79%
Level 2: 60%+
AIPMT - 2011
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The time of reverberation of a room \(A\) is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double those of room A?

1. 2

2. 4

3. 12

4. 1

Subtopic:  Speed of Sound |
Level 3: 35%-60%
AIPMT - 2006
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