AC has an outside diameter of 250mm and CD has an outside diameter of 150mm. Both pipes have a wall thickness of 8mm. Torques are applied at B and C. Find the reactions at A and D. Gsteel= 77.2GPa, Gcopper = 44GPa.

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.