, 26.04.2020 06:59 spencertodd742

# Companies are burning coal through combustion to produce electricity. The amount of electrical energy produced is less than the amount of stored potential energy found in coal. Which best explains this observation? A) There is no way to know the amount of energy in coal B) Some of the potential energy in the coal is converted into heat energy. C) As turbines and generators in the power plant convert potential energy to kinetic, some of the energy is lost. Eliminate D) Due to the intense heat during combustion, some some potential energy is destroyed before being converted to kinetic energy.

### Another question on Physics

Physics, 21.06.2019 19:30
Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?