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Physics

Physics
Red light has a wavelength of 70 A°. In "nm" it is

700 nm
70 nm
7 nm
0.07 nm

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Physics
Mud houses are cooler in summers and warmer in winters as compared to brick houses because

Mud is a poor insulator
Evaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters
Mud is a bad conductor
Mud is a good conductor

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Physics
The tidal waves on sea is mainly due to

Gravitational Effect of Moon on Earth
Gravitational Effect of Earth on Moon
Gravitational Effect of Sun on Earth
None of these

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Physics
Which of the metals has the maximum thermal conductivity?

Silver
Copper
Iron
Aluminium

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Physics
A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

5.41 sec
4.65 sec
3.44 sec
2.87 sec

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Physics
The speed of sound travel fastest through

Gas
None of these
Solid
Liquid

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MORE MCQ ON Physics

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