The answer is D.
C and A are incomplete as they only treat specific types of energy, and B doesn't answer the question.
If your talking about the chemical equations like combustion, single displacement, etc. Then the equation would be double displacement:
AB + CD ---> AD + CB
The force of gravity is the
force with which massively large objects such as the earth attracts another
object towards itself. All objects of the earth exert a gravity that is
directed towards the center of the earth. Therefore, the force of gravity of
the earth is equal to the mass of the object times acceleration due to gravity.
F = ma
4.9N = m (9.8 m/s^2), note that
N (newtons) = kg-m/s^2
<u>m = 0.5 kg</u>
<u>The mass of the object is
0.5kg.</u>
It will consume 60wh=0.06kwh
