Tim has a mass of 50kg. He slips on ice and falls for one full second before impacting a concrete slab. How fast is Tim traveling when he impacts the ground

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.