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Physics

Physics
The magnitude of buoyant force depends on the ________ of the fluid.

Volume
Temperature
Density
Mass

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Physics
The reason for a swimming pool to appear less deep than the actual depth is

Reflection
Light scattering
Refraction
Interference

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Physics
Which one of the following wavelengths of light is most effective in photosynthesis ?

Orange
Blue
Yellow
Green

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Physics
The base of an electric iron is brightly polished mainly

To make it smooth and frictionless
To make it rust-proof
To make it more durable
To reduce heat loss by radiation

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Physics
When a running car stops suddenly, the passengers tends to lean forward because of:

Inertia of motion
Inertia of rest
Gravitational force
Centrifugal force

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Physics
Outside of cooking utensils are generally left black from below because

Black surface is a good absorber of heat.
It is difficult to clean daily.
Black surface is a poor conductor of heat.
Black surface is a good conductor of heat.

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