Two parallel plates 19 cm on a side are given equal and opposite charges of magnitude 2.0 ✕ 10^−9 c. the plates are 1.8 mm apart. what is the electric field (in n/c) at the center of the region between the plates? (enter the magnitude.)

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

If element x has 99 protons how many electrons does it have

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.