The 2-m long bar AB with a mass of 2 kg, and of small cross section rotates in a horizontal plane (x-y) about a vertical axis (z) which passes through A. It accelerates uniformly from 20 rev/min to 30 rev/min in 5.0 s. after which the angular velocity remains constant. a) What is the linear velocity of its mid point at the beginning and at t

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.