A rock is dropped ( from rest) off a bulding of unknown height. it takes 3.2s to hit the ground. what is the rock's velocity (magnitude and direction) just before it hits the ground? note: gravity is 9.8 meters per seconds squared

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material