PLEASE HELP 2.Write the formula associating energy with power 

 3.Write the formula associating potential energy with height. 

4. By substitution of the formula on question 3 for the formula in question 2, rewrite the formula for power.
(PLEASE HELP ASAP ILL MARK BRAINLIEST) ​

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

What happens when a rubber rod is rubbed with a piece of fur?

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