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Physics

Physics
Calculate the time period (in seconds) of a sound wave of wavelength 4m traveling with a speed of 500m/s

0.016
0.008
1000
2000

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Physics
The colour of the ocean appears to be blue because the sunlight falling on it is

Scattered
Reflected
Refracted
Diffracted

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Physics
Boyle's law is a relationship between

Pressure and volume
Pressure and temperature
Volume and temperature
Volume and density

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Physics
Which sources produce alternating current (AC)?

Batteries
Solar power plants
All of these
Hydro-electric generators

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Physics
Which of the following is not caused by atmospheric refraction of light ?

Twinkling of stars at night
Sun becoming visible two or three minutes before actual sunrise
Sun appearing red at sunset
Sun appearing higher in the sky than it actually is

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Physics
Sound cannot pass through

Air
Water
Vacuum
Steel

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