PDF chapter test TRY NOW
1. Through which medium sound travels faster, iron or water? Give reason.
a. are more densely packed than liquids.
b. are more densely packed than gases.
2. Name the physical quantity whose SI unit is ‘\(hertz\)’.
a. The is the SI unit of frequency.
b. The of a wave is defined as the number of vibrations (complete waves or cycles) produced in one second.
3. What is meant by supersonic speed?
a. The is the SI unit of supersonic speed.
b. When an object travels faster than the speed of sound in air (\(330\) \(m/s\)), it is said to be travelling .
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