Show that the Newton's law of linear motion is homogeneous with respect to its unit

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

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