How do you calculate potential energy

(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

Describe cytokinesis in plants and animals. in animals: in plants.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.