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Physics

Physics
Sound waves cannot travel in

Glass
Hydrogen gas
Vacuum
Water

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Physics
In mirrors the back surface is coated with a thin layer of :

Silver nitrate
Mercury
Silver
Red oxide

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

Atomic clocks
Pulsars
White dwarfs
Quartz clocks

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Physics
Which of the following property of sound is affected by change in air temperature?

Wavelength
Intensity
Frequency
Amplitude

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Physics
Sound waves do not show the phenomenon of

Polarisation
Interference
Refraction
Diffraction

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Physics
Gravitational force is maximum at which place

Tropic of cancer
Poles
Tropic of capricorn
Equator

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