Water that flows from behind a large dam can cause machines to produce electricity. What change take place? Heat energy into mec
hanical energy, Sound energy changes into electrical energy, Chemical energy is used to produce electrical energy, Mechanical energy is used to produce electrical energy.
The correct option is Mechanical energy is used to produce electrical energy.
The water stored in a dam at some height above the surface of earth has the gravitational potential energy. This potential energy gets converted into kinetic energy when the water starts moving. This running water hits the turbine which rotates and thus electricity is produced. So it is mechanical energy ( kinetic energy and potential energy ) that gets converted into electrical energy.
Heat = change in internal energy + Work done The internal energy of a system = heat added and mechanical work done by the system, i.e. U = Q + W rearranging the formula above, will give us: Q = deltaU + W Q = U - W = 604 kJ - 43.0 kJ = 561,000 J would be the answer.
