E3 Quiz A cart is traveling along a track and slows down due to friction. Which of the statements below best explains why the cart slows down, in terms of
energy?
A- Kinetic energy from the cart is converted to thermal energy in the track
OB - Kinetic energy from the cart is converted to thermal energy in the cart
OC - Kinetic energy from the cart is converted to potential energy in the cart
D - All of the above
E-A and B only
F. None of these
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What object a collides with object b and bounces back its final momentum is?

If you put a helium-filled balloon in the refrigerator, what will happen?

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.