An electric current requires the movement of particles, which could be electrons or ions. A solid ionic substance does not conduct an electric current because the ions are in place in the crystal structure. When dissolved in water, the ions and are therefore free to move.

What are similarities and differences of reflection, refraction, diffraction and absorption?

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

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