A student drops a ball from a height of 49.0m. If the ball increases speed at a uniform rate of 9.81m/s2, determine all unknowns. How long did the ball remain in the air? What was the ball’s speed just before striking the ground?

What is offspring? why does a longer life span mean a higher chance of producing offspring?

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.

Work requires a force which causes: potential energy or motion