Which of the following is a science ?

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

How do the forces acting on a boat compare to the force acting on a plane ?

If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?