Calculate the energy released in kilowatt hours from the fission of 4.2 kg of 235u. (assume each fission produces 200 mev of energy.) 95636879 correct: your answer is correct. kwh compare this with the energy released from the combustion of 4.2 kg of coal. the heat of combustion of coal is about 29,000 btu/kg.

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

What is the mass of the same rock on the earth