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Physics

Physics
Amount of water vapour in the atmosphere is measured in terms of

Humidity
All of these
Smog
Droplets

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Physics
Supercooling is cooling of liquid ________

Below freezing point
At melting point
Below melting point
Above melting point

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Physics
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as

Ultrasonics
Infrasonics
Audible sounds
Megasonics

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Physics
Kepler's law of planetary motion states that the square of the time period is proportional to the

Semi-major axis
Cube of the semi-major axis
Fourth power of the semi-major axis
Square of the semi-major axis

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Physics
Which, of the following radiations has the least wavelength ?

G-rays
A-rays
X-rays
B-rays

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Physics
In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is

Decreased by 4%
Increased by 2%
Decreased by 2%
Increased by 4%

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