Ared cart with a mass of 67 kg and a speed of 5 m/s hits a stationary blue cart. if the impact is elastic and the cars are identical in mass, what is the speed of the blue car after the impact?

b.

explanation:

10.0

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.