What is the average speed of the cart

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Explain why electric current cannot exist if a current doesn't have a voltage source.

What is the coefficient of kinetic friction μk between the block and the tabletop?