Physics
What is the unit of the physical quantity "Jerk"?

Meter per second
Meter per second square
Meter second
Meter per second cube

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Physics
In total internal reflection, the light travel from

Rarer to denser medium and it occurs with no loss of intensity
Denser to rarer medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity
Rarer to denser medium and it occurs with loss of intensity

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