A total charge Q is uniformly distributed on a thread of length l. The thread forms a semicircle. What is the potential at the center? (Assume V=0 at large distances.) Express your answer in terms of the variables Q, l, and appropriate constants.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.

What equation is used to calculate the weight of an object on a plant ?