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Physics

Physics
What is the SI unit of Force?

Watt
Boyle
Newton
Pascal

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Physics
A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is

Zero
Less than the weight of the man
Same as the weight of the man
Greater than the weight of the man

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Physics
The primary agent of contact metamorphism is

Weathering
Flowing water
Temperature
Pressure

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Physics
Metals are good conductors of electricity because:

They contain free electrons.
They have high melting point.
The atoms are lightly packed.
All of these

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Physics
In nuclear reactor, heavy water is used as

Coolant
Moderator
Atomic smasher
Fuel

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Physics
Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K?

2k1k2/k1+k2
K1k2/k1+k2
None
K1+k2/k1k2

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