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PHYSICS

Physics
What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?

Becomes zero
Increases exponentially
None of these
Remains constant

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Physics
The force that keeps a body in a circular motion called

The centripetal force
All listed here
The centrifugual force
The frictional force

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Physics
It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because

Centre of gravity falls within the body
Weights of buckets are balanced
Resultant weight of buckets is zero
Centre of gravity and centre of equilibrium fall within the feet

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Physics
The working of a rocket is based on the principle of:

Conservation of mass
Conservation of energy
Conservation of momentum
Conservation of angular momentum

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Physics
A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments

Is zero
Depends on the total mass of all the fragments
Depends on the speeds of various fragments
Is infinity

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