Need asap does this intro simulation support the law of conservation of energy? use evidence to explain why or why not.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.

1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?