If you had a sample containing 55 alpha particles, how many protons would be present in that sample?

Newton's law of universal gravitation states that the force f between two masses, m1 and m2, is given below, where g is a constant and d is the distance between the masses. find an equation that gives an instantaneous rate of change of f with respect to d. (assume m1 and m2 represent moving points.)

Which would not reduce the amount of green house gasses in the air

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