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Physics

Physics
Increased wind speed is accompanied by a reduced air ________

Density
Humidity
Aridity
Pressure

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Physics
For a ray of light to suffer total internal reflection it has to pass from :

Water to glass
Air to glass
Air to water
Glass to water

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Physics
In the case of bodies falling under gravity which of the following remains constant at a given place?

All listed here
Kinetic energy
Acceleration
Potential energy

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Physics
In radio-communication, the signals emitted by transmitting antenna are reflected on

Ionosphere
Ozonosphere
Stratosphere
Troposphere

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Physics
The velocity of heat radiation in vacuum is

Greater than that of light
Less than that of light
Equal to that of sound
Equal to that of light

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Physics
Natural radioactivity was discovered by

Ernest Rutherfor
Enrico Fermi
Marie Curie
Henri Becquerel

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