One hundred kilojoules of heat are transferred from a heat reservoir at 600 k to the environment at 300 k. a)- find the change in entropy of each reservoir in kjk^-1 b)- is the sum in agreement with the second law? c)- determine the total entropy changes if the environment temperature was only 275 k.

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?