2-In A Closed System (No Friction), There Is A Pocket Watch Swinging Back And Forth. How
Much Of The Kinetic Energy Will Become (Convert)
Into Potential Energy When The Watch Finishes
Swinging From Its Lowest Point Up To Its Highest
Point?

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)