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Physics

Physics
An instrument that records earthquakes is

Ergograph
Thermograph
Ediograph
Seismograph

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Physics
Stars appears to move from east to west because

The earth rotates from west to east
The earth rotates from east to west
The background of the stars moves from west to east
All stars move from east to west

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Physics
The value of coefficient of restitution in perfectly elastic collision is

1
0.5
2

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Physics
The speed of sound travel fastest through

Gas
Solid
None of these
Liquid

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Physics
Total internal reflection can not take place when light goes from :

Glass to air
Glass to water
Water to air
Water to glass

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Physics
Magnetic keepers are used to protect magnets from :

Self-demagnetization
Effect of other magnets
Earth's magnetic field
Demagnetization due to heating

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