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Physics

Physics
The washing machine works on the principle of

Centrifugation
Diffusion
Dialysis
Reverse osmosis

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Physics
Red is used as an emergency or danger signal as

It is a striking colour
It has very high energy
Its wavelength is the longest
It is scattered

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Physics
According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ________ of an object.

Density
Force
Volume
Mass

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Physics
Which of the following are used for accurately measuring very small time intervals ?

Quartz clocks
Pulsars
White dwarfs
Atomic clocks

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Physics
The frequency used in TV and radar system lies in

UHF
VHF
HF
SHF

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Physics
Sun appears red in colour at sunrise and sunset due to

The fact that sun emits only red colour at that time
That sun comes out of the mountains
That all other colours scatter away except red
Red light having longer wave length scatters away

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