The area underneath the mechanic's piston is 0.1 metre squared, and the area underneath the car's piston is 10 metre squared. If the car weighs 1000kg (also 10000N), how much force does the mechanic need to apply to lift it? (Hint: remember force is measured in Newtons, not kilograms)

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.

d) physical means can be used to separate the components of air.