(a) what is the acceleration of gravity on the surface of the moon? the mass of the moon is 7.35 x 1022 kg and its radius is 1.74 x 106 m. (b) what is the acceleration of gravity on the surface (or outer limit) of mercury? the mass of mercury is 3.30 x 1023 kg and its radius is 2.44 x 106 m

Part a)

a = 1.62 m/s/s

Part b)

a = 3.70 m/s/s

Explanation:

Part A)

Acceleration due to gravity on the surface of moon is given as

here we know that

now we have

Part B)

Acceleration due to gravity on surface of Mercury is given as

here we know that

now we have

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

think its the third option