Light wands are small tubes that can be used to give off light without electricity or fire.

a light wand keeps two fluids separate from each other until the wand is bent. once the wand is bent, the tube holding the inner fluid breaks, and the two fluids mix together inside the wand

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

Name two kinds of practical electric pumps.

Consider an air-filled charged capacitor. how can its capacitance be increased?