Which statement describes the photoelectric effect? A. Electrons strike a metal and their kinetic energy becomes light.
B. The kinetic energy of an electron equals the energy of light that shines on it.
C. Brighter lights decrease the number of electrons that flow in a circuit.
D. Light shines on a metal and causes electrons to be emitted.

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

Which two particles are found in the center of an atom

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s