A raindrop in a cloud has 320 J of potential energy due to its position above Earth. As the raindrop falls down to Earth, it gains kinetic energy. Approximately how much kinetic energy does the raindrop have the moment before it makes contact with a puddle on the ground? 0J
640 J
160 J
320 J

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)