Physics
When a card placed over a tumbler is flicked with the finger, the coin placed over it falls in the tumbler.

Law of Inertia
Newton's third law of motion
Law of conservation of momentum
Law of conservation of energy

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Physics
Superconductors are those elements

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

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