Abatch of parts is produced on a semi-automated production machine in a sequential batch production operation. batch quantity is 300 units. setup takes 55 min. a worker loads and unloads the machine each cycle, which takes 0.75 min. machine processing time is 3.46 min/cycle, and tool handling time is negligible. one part is produced each cycle. determine (a) average cycle time, (b) time to complete the batch, and (c) average production rate.

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.