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Which of the following is the speed of sound in copper and which in aluminium?
(a) 5100 m/s
(b) 1500 m/s
(c) 3750 m/s
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If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
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What is the speed of sound :
(a) in air?
(b) in water?
(c) in iron?
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What name is given to those aircrafts which fly at speeds greater than the speed of sound?
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A jet aircraft flies at a speed of 410 m/s. What is this speed known as?
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What is meant by supersonic speed?
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Which of the following travels slowest in air and which one fastest? Supersonic aircraft, Light, Sound
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Which term is used to denote a speed greater than the speed of sound?
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What is the time-period of a tuning fork whose frequency is 200 Hz?
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Calculate the frequency of a wave whose time-period is 0.02 s.
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Which subatomic particle is not present in an ordinary hydrogen atom?
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A cricket ball is seen to hit the bat first and the sound of hitting is heard a little later. Why?
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Explain why, the flash of a gun shot reaches us before the sound of the gun shot.
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Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
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A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
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State whether the following statement is true or false:
The symbol of element cobalt is CO.
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Name the element used as a standard for atomic mass scale.
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Which particular atom of the above element is used for this purpose ?
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A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
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A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
Concept: undefined >> undefined
