Replace the two forces acting on the frame by a wrench. Write both the force R and the moment M of the wrench as vectors and specify the coordinates of the point P in the y-z plane through which the line of action of the wrench passes. Note that the force of magnitude 200 N is parallel to the x-axis.

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.