If you divide the mass of a substance by its volume, you can find its density. select the best answer from the choices provided
a. true
b. false

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?