A 60-kilogram skydiver is falling at a constant speed near the surface of earth. The magnitude of the force of air friction acting on the skydiver is approximately A) 0 N
B)6 N
C) 60 N
D) 600 N

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