Ablue car heading north (direction 0°) collides at an intersection with a green car heading east (direction 90°.) both cars have the same mass. immediately after the collision, the cars lock together and travel at 28 m/s in direction 16°. what is the speed of the blue car just before the collision? a.44 m/s
b.11 m/s
c.54 m/s
d.30 m/s

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.