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Physics

Physics
The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

15 cm
5 cm
20 cm
10 cm

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Physics
If the earth suddenly stop rotating, the value of "g" will be

Same
Increase
Decrease
Become Zero

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Physics
Which of the following causes adiabatic temperature changes in atmosphere?

Deflection and advection
Latent heat of condensation
Expansion and compression of the air
Partial absorption of solar radiation by the atmosphere

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Physics
Convex mirrors are used as a rear view mirror in motor cycles because

It forms erect (upright) image
It forms smaller image as compared with object
It forms real image
All of these

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Physics
If the spinning speed of the earth is increased then the weight of body at the equator

Increases
Same
Double
Decreases

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Physics
If there were no gravity, which of the following will not be there for a fluid?

Pressure
Viscosity
Upward Thrust
Surface Tension

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