The function of an electric motor is to change (1 point). a) chemical energy into electrical energy. b) electrical energy into chemical energy. c) electrical energy into mechanical energy. d) mechanical energy into electrical energy

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The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?