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Physics

Physics
The time period of a seconds pendulum is

1.5 second
0.5 second
2 seconds
1 second

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Physics
A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will

Bend towards right
Remain straight
Bend towards left
None of these

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Physics
In a freezer ice cubes will be formed more quickly in trays made of

Rubber
Plastic
Aluminium
Wood

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Physics
The unit of measurement of noise is

Decibel
Hertz
Acoustics
Amplifier

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Physics
Which one of the following is a non-dimensional quantity?

Strain
Gas constant
Plank's constant
Co-efficient of viscocity

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Physics
Speed of sound in air is unaffected by change in

Humidity
Temperature
Volume
Pressure

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