Idon’t know the answer to it and am stuck.

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.

this is a good question! i'll do some research and come back when i have the answer!

frequency or wavelenth of em radiation in a vacuum

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it