A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.3. Its velocity at point A is 10 m/s and at point B is 4 m/s. Use the momentum principle to find out how long thesled takes to travel from point A to point B.

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.

nah.   i'm just sleepy.

third one with arrows on top of each other going the same direction