Physics
Which phase change is an example of an exothermic process?

Liquid to Solid
Gas to Solid
Gas to Liquid
All listed here

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Physics
In total internal reflection, the light travel from

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

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