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ivann1987 [24]
2 years ago
11

Question 54 (1 point)

Engineering
2 answers:
Rudiy272 years ago
6 0
The answer should be Oc 15
Sergeeva-Olga [200]2 years ago
6 0
Oa 8 should be the answer of the moisture of lumber frame for the house
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?

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Carnot heat engine A operates between 20ºC and 520ºC. Carnot heat engine B operates between 20ºC and 820ºC. Which Carnot heat en
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engine B is more efficient.

Explanation:

We know that Carnot cycle is an ideal cycle for all working heat engine.In Carnot cycle there are four processes in which two are constant temperature processes and others two are isentropic process.

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\eta =1-\dfrac{T_1}{T_2}

Here temperature should be in Kelvin.

For engine A

\eta =1-\dfrac{T_1}{T_2}

\eta =1-\dfrac{273+20}{520+273}

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For engine B

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\eta =1-\dfrac{273+20}{820+273}

\eta =0.73

So from above we can say that engine B is more efficient.

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An aluminum metal rod is heated to 300oC and, upon equilibration at this temperature, it features a diameter of 25 mm. If a tens
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It will results in mechanical hardening.

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PLEASE HURRY!!!
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He should get a job in engineering to see what it's like to work in the field.

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