Why does increasing temperature increases vibration of molecules in conductors so it decreases it’s conductivity while in semi-conductors it increases it’s conductivity and no vibrations occurs in the molecules! ?

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

What is the speed of an object at a given moment?