PLEASE HELP WHICH ONE IS CORRECT

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

By what primary heat transfer mechanism does the sun warm the earth?

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