Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional force of 40.0 N, what is the temperature increase

The one that describes a relationship when calculating the energy of a photon is :
the energy of a photon is directly proportional to frequency
Energy of a Photon is calculated by :
E = hv   ,
v is frequency
As v increases, E will also be increased

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