5. Why do we see a full moon only once every 29.5 days? A. It takes the moon 29.5 days to rise and set one time.
B. It takes Earth 29.5 days to make one rotation on its axis.
C. It takes Earth 29.5 days to make one revolution around the moon.
D. It takes the moon 29.5 days to make one revolution around Earth.

C is the correct answer

Explanation:

The moon cycle is last 29.5 days

answer is d

Explanation:

it takes the moon 29.5 days to make one revolution around earth

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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