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Physics

Physics
Sound waves do not show the phenomenon of

Refraction
Polarisation
Interference
Diffraction

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Physics
A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

1568 N
1568 W
1568 C
1568 J

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Physics
The velocity required to place a vehicle in orbit around the moon is ________ that required to place it in orbit round the earth.

Greater than
Less than
Greater than or equal to
Equal to

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Physics
When milk is churned, the cream separates from it due to:

Centrifugal force
Viscous forces
Gravitational force
Frictional force

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Physics
In SONAR which kind of wave is used?

Radio
Audible sound
Infrasonic
Ultrasonic

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Physics
The velocity of heat radiation in vacuum is

Equal to that of light
Greater than that of light
Less than that of light
Equal to that of sound

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