Which two statements describe reasons a solar cell must contain semiconductors? A. Semiconductors form a path for the electrons that are released by the photoelectric effect.

B. Semiconductors reflect all forms of electromagnetic radiation.

C. Semiconductors serve as a source of electrons to form an electrical current.

D. Current flows from the positively charged semiconductor to the air above the glass covering

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?