Cobalt-56 has a half-life of 78 days. Starting with 1.42 mg of this isotope, how much would remain after 312 days?

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d