Physics, 10.06.2020 20:57 granthazenp5e9mj
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In which situations (1-5) the internal energy of the body changes as a result of work (A), and in which - as a result of heat flow (B)? Mark the correct squares.
1. The bullet hit the shield.
2. People sitting by the hot fireplace felt warm.
3. The stone statue, standing in a sunny place, warmed up on one side.
4. The metal ball was thrown into hot water.
5. While braking the car's tires warmed up
Answers: 2
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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.
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Ahurricane sweeps across the ocean and damages the houses of people living along the coast. which of these does not play any role in this interaction? air water glaciers living things
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In which situations (1-5) the internal energy of the body changes as a result of work (...
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