When a rolling yo-yo falls to the bottom of its cord, what is its rotation as it climbs back up the cord? a. reversed rotation due to the rebound
b. reversed rotation due to inertia
c. same rotation due to the rebound
d. same rotation due to inertia

(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