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Physics

Physics
Which of the following is the unit of Astronomical Distance ?

Parsec
Para/sec
Sec
Metre/sec

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Physics
What is the minimum distance (in metres) required to hear an echo?

10
17
13
21

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Physics
When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as

Doppler effect
Beats
Resonance
Echo

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Physics
The inability of a body to change its state of rest or uniform motion along a straight line is called its

Acceleration
Inertia
Velocity
Momentum

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Physics
Light travels at the fastest speed in:

vacuum
glass
hydrogen
water

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Physics
Total internal reflection can not take place when light goes from :

Glass to water
Water to air
Water to glass
Glass to air

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