Physics
One Kilowatt hour is equal to -

4.0 Mega Joule
3.6 Mega Joule
3.8 Mega Joule
3.2 Mega Joule

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Physics
Negative feedback in amplifiers

Decreases bandwidth and increases noise
Decreases bandwidth and decreases noise
Increases bandwidth and decreases noise
Increases bandwidth and increases noise

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

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

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