The potential energy of a 0.15 kg pendulum is 15 j at the tops of its swing, what is its kinetic energy at the bottom?
a) 2.25 j
b) 0 j
c) 15 j
d) 18.3 j

(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

Which subatomic particle has a negative charge

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these