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

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

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Physics
Superconductors are those elements

Whose conductivity is intermediate between metals and insulators
Which turn into insulators at very low temperatures
Which conduct electricity only at super-high temperatures
Whose resistance falls almost to zero at very low temperatures

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