Physics
When the milk is churned vigorously the cream from it is separated out due to

Centrifugal force
Frictional force
Centripetal force
Gravitational force

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Physics
It is more difficult to walk on a sandy road than on a concrete road because

the friction between sand and feet is more than that between concrete and feet.
sand is soft and concreter is hard.
the friction between sand and feet is less than that between concrete and feet.
the sand is grainy but concrete is smooth.

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Physics
Which of the following events occurred first ?

Max Planck unveiled the Quantum Theory
Madame Marie Curie became the first woman Nobel Prize winner
Albert Einstein propounded the General Theory of Relativity
Marconi first tranmitted a wireless signal

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