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Physics

Physics
In uniform circular motion, the linear velocity is perpendicular to

Momentum
Radius
Force
Radius vector

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Physics
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

100 J
150 J
75 J
50 J

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Physics
Rainbow is seen after rain because of hanging molecules of water which act as

Lenses
Mirrors
Prisms
Slabs

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Physics
The layer of atmosphere used for radio-wave transmission is

Troposphere
Stratosphere
Ionosphere
Chromosphere

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Physics
At boiling point of liquids, its

Temperature remains constant
Vapour pressure decreases
Temperature increases
Atmospheric pressure increases

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Physics
In which of the following cases, kinetic energy is being used in performing work ?

Paddling the bicycle to cover a distance
Driving a car to cover a distance
Rowing a boat in the lake
Wind mill grinding wheat grain

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