Two 500g carts are on a frictionless track . Can A is moving at 0.2 m / s when it collides into Cart B which at rest . Both cars move away at 0.1 m / s Compared to the total energy of the system before the collision what percentage of energy is transferred to thermal energy in the collision ?

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.