4- three books (x, y, and z) rest on a table. The weight of each book is indicated in the given figure. 6-how many forces act on the book (y)?.

Convection occurs when thermal energy is transferred by the movement of

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter