Greg checks his watch one day at noon when the sun is directly overhead. he decides to check his watch when the sun is directly overhead again tomorrow. about how many hours will pass before the sun is directly over greg's head again? round to the nearest hour. hour(s)

After 24 hours the sun will be directly over Greg's head again.

Explanation:

Every day, the sun is above our heads. This moment always happens at the same time, at noon, for that reason at that time it seems that the environment gets warmer.

If Grege observed that at noon the sun was directly above his head, he will not be able to notice it until the next day, at noon. That is, Greg will have to wait 24 hours for the sun to set directly above his head.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.