Which term refers to the phenomenon of light shining on a metal and causing electrons to break free from their atoms? a. blackbody radiation b. ultraviolet catastrophe c. emission spectra d. photoelectric effect

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?