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Physics

Physics
Infrasonic sound has a frequency lower than

20 Hz
32 Hz
5 Hz
15 Hz

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Physics
Energy per unit volume is dimensionally equal to

Density
Force
Pressure
Work

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Physics
When light passes from one medium to another, this phenomenon of change in its direction is called ________

Refraction
Propagation
No option is correct
Diffraction

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Physics
Which determines the frequency of a sound wave?

Speed
Medium
Source
Amplitude

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Physics
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

LUV < lIR < lVIS
LUV > lVIS > lIR
LUV < lVIS < lIR
LUV > lIR > lVIS

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Physics
Which of the following causes adiabatic temperature changes in atmosphere?

Deflection and advection
Latent heat of condensation
Expansion and compression of the air
Partial absorption of solar radiation by the atmosphere

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