D. The hydrogen, being a smaller atom, will take up less space than the oxygen. It will push the water down less.
The answer is B. A frame of reference that is accelerating.
First we have to establish that the number of protons is equivalent to the atomic number of element. Here I am assuming that you are referring to Potassium (K) - 40. Potassium, stable or unstable has 19 protons.
I believe the correct answer is false. <span>The entropy of an isolated system must not be conserved, so it changes. Entropy always tend to increase and tend to favor change. Entropy is a measure of disorderliness of a system.</span>