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Physics

Physics
The atmospheric air is held to the Earth by :

Winds
Clouds
Gravity
Rotation of the Earth

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Physics
When all the forces and torques are balanced in a mechanical body it is said to be in

Equilibrium
None of these
Buoyancy
Static

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Physics
One light year is equal to

2 trillion miles
9 trillion miles
6 trillion miles
8 trillion miles

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Physics
Steam at 100°C causes more severe burns than water at 100°C because

Steam has latent heat of vaporisation
Water has no specific heat capacity
Water has latent heat of fusion
Steam has no specific heat capacity

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

Kinetic energy
Acceleration
Potential energy
All listed here

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Physics
One watt-hour is equivalent to

3.6 x 103 J
6.3 x 10-7 J
6.3 x 103 J
3.6 x 10-3 J

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