Physics
What is the direction of torque?

Opposite to the direction of applied force
Parallel to the radius
Same as the direction of applied force
Perpendicular to the direction of applied force

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Physics
In the gamma decay of a nucleus

The mass number of the nucleus does not change whereas its atomic number changes
Both the mass number and the atomic number of the nucleus change
The mass number of the nucleus changes whereas its atomic number does not change
Neither the mass number nor the atomic number of the nucleus changes

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Physics
We always see the same face of the moon, because

It rotates at the same speed as the earth around the sun
It revolves on its axis in adirection opposite to that ofthe earth
It takes equal time for revolution around the earth and rotation on its own axis
It is smaller than the earth

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