Physics
It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

Pascal's law
Law of inertia
Newton's third law
Newton's second law

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Physics
In total internal reflection, the light travel from

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

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