You row a boat perpendicular to the flow of a river, which is flowing with a velocity with a magnitude of 15 m/s. The boat, in still water, is capable of moving with a velocity with a magnitude of 6.5 m/s. What is the resultant velocity of the boat?

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