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Physics

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

Temperature
Mass
Volume
Density

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Physics
We feel cool when we sit near the fan, this is because

Fan gives cool air.
Fan cools surrounding air.
We feel cool when air touches the body.
Air vapourises the sweat on our body.

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Physics
Atomic hydrogen has a life period of

One hour
One minute
One day
A fraction of a second

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Physics
The oldest type of energy known to man is

Wind power
Solar power
Geothermal energy
Tidal energy

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Physics
Boyle's law is a relationship between

Pressure and volume
Pressure and temperature
Volume and density
Volume and temperature

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Physics
After long periods of use, a grey spot develops on the inside of a bulb. This is because

The tungsten filament evaporates and collects there
The heat of the bulb scorches the glass at the top
Dust inside the bulb condenses on the top
Glass undergoes a change due to the heat

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