Manny is using a screwdriver to pry open the lid of a paint can. He applies a force of 25 N to the end of the screwdriver. In turn, the screwdriver applies a
force of 375 N on the lid. What is the mechanical advantage of the
screwdriver in this case?

Heat from the sun reaches earth to a. radiation b. convection c. conduction

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?

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door