Apiston in a heat engine does 500 joules of work, and 1,400 joules of heat are added to the system. determine the change in internal energy and explain how this example demonstrates the conservation of energy.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space