Which of the following accurately describes the role of potential energy in the hydroelectric dam? a. Potential energy is almost non-existent due to water resting in the reservoir.

b. There is no potential energy due to a lack of gravity.

c. Potential energy exists as moving water.

d. Potential energy exists due to gravity.

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.