You cross two pure tall (tt) plants with two pure short (tt) plants and produce four offspring. which of the following statements about the offspring is correct?

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

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion