Physics
Out of the following pairs, which one does not have identical dimension?

Moment of inertia and moment of a force
Impulse and Momentum
Angular momentum and Planck's constant
Work and Torque

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Physics
Railway tracks are banked on curves so that

Necessary centrifugal force may be obtained from the horizontal component of the weight of the train
No frictional force may be produced between the tracks and the wheels of the train
The train may not fall down inwards
Necessary centripetal force may be obtained from the horizontal component of the weight of the train

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