Matthew starts from rest on top of 8.45 m high sledding hill. he slides down the 32-degree incline and across the plateau at its base. the coefficient of friction between the sled and snow is 0.128 for the plateau and the hill is frictionless. matthew and the sled have a combined mass of 27.5 kg. determine the distance which matthew will slide along the level surface of the plateau before coming to a complete stop.

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Which subatomic particle has a negative charge

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.