The attractive electrostatic force between the point charges 6.14×10−6 c and q has a magnitude of 0.845 n when the separation between the charges is 9.26 m . part a find the sign and magnitude of the charge q.

An apple is falling from a tree. disregarding air resistance, which diagram shows the free-body diagram of the force or forces acting on the apple?

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?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up