System gives off 196 kj of heat to the surroundings and the surrounding do 4.20x 10^2 kj of work on the system. What is the change in internal energy of the system.

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