Four solid plastic cylinders all have radius 2.55 cm and length 5.70 cm. find the charge of each cylinder given the following additional information about each one. cylinder (a) carries charge with uniform density 15.4 nc/m2 everywhere on its surface.

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.