حل واجبات فيز 102 ترم 113

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According to the first law of thermodynamics and other laws, which statement is FALSE?



a. The internal energy E_int of a system increases if heat Q is added to the system.

b. The internal energy E_int of a system decreases if work W is done by the system.

c. The internal energy E_int of a system increases if heat Q is lost from the system.

d. The quantity (Q – W) is the same for all thermodynamic processes.

e. The change in the internal energy E_int of a system is equal to (Q – W).


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2. Ch18_Lec3_Q2 (Points: 1)
Gas held within a chamber passes through the cycle shown in the figure below. Determine the MAGNITUDE of energy transferred by the system as heat during process CA if the energy added as heat QAB during process AB is 25.8 J, no energy is transferred as heat during process BC, and the net work done during the cycle is 10.3 J. (Give your answer in three significant figures form)





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3. Ch18_Lec3_Q3 (Points: 1)
A solid cylinder of radius r = 2.5 cm, length h = 5.0 cm, emissivity 0.85, and temperature 25.7°C is suspended in an environment of temperature 55.0°C. Find the cylinder's net thermal radiation transfer rate P (in watt). (Give your answer in three significant figures form)

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