Now the student moves the box up a ramp (with the same coefficient of friction) inclined at 11.6 ◦ with the horizontal. b) if the box starts from rest at the bottom of the ramp and is pulled at an angle of 28◦ with respect to the incline and with the same 189 n force, what is the acceleration up the ramp?

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.