In one type of solar energy system, sunlight heats the air within solar panels, which heats copper tubes filled with water. what type of energy is produced by this system? a.. geothermal energy. b.. hydroelectric energy. c.. electric energy. d.. heat energy

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?