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Physics

Physics
Period of oscillation of 3 cm microwaves in seconds is

1 × 1010
0.001
1 × 10–10
0.01

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Physics
The dimensional formula ML–1T–2 corresponds to

Modulus of elasticity
Viscosity
Moment of a force
Thrust

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Physics
The speed of sound in air depends on

Temperature
Wavelength
None of these
Frequency

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Physics
Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength.

Microwave, infrared, visible. X-rays
Visible, infrared, microwave, X-rays
X - rays, infrared, visible, microwave
X -rays, visible, infrared, microwave

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Physics
Rainbow is seen after rain because of hanging molecules of water which act as

Slabs
Lenses
Mirrors
Prisms

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Physics
stars which appear single to the naked eye but are double when seen through a telescope are

quasars
novas and supernovas
asteroids
binaries

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