Which element makes up most of the Sun?
A. Sodium
B. Carbon
C. Lithium
D. Hydrogen

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

(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