The definition of the period of a wave is the time that it takes for the wave to complete one cycle. As stated in the problem, the certain water wave completes one cycle in 2 seconds. From this information alone, we can conclude that the period of the wave is indeed, 2 seconds.
2. Because it has gravity and gravity pulls it to the earth.
3. Because of the chemicals it has in it.
4. a. by running with it
b. by pulling it.
c. by turning it.
d. by truning it.
By definition, the atomic mass of an element is approximately the sum of the mass of protons and neutrons.
Of the choices given, C makes the most sense.
Answer: C) the number of protons and neutrons in an atom.
