I need to solve this question: a) m=200 g, h=0.039 m. Find W=mgh b) We have a pa

Question

I need to solve this question: a) m=200 g, h=0.039 m. Find W=mgh b) We have a parallelogram P(kPa) Vs V (m^3). P is from 106.07 to 103.6 kPa. And V is from 1.32 to 1.62m^3. Calculate the area enclosed by the P-V diagram. Show your calculations with units. Hints: Careful use of appropriate SI (MKS) units is essential. The pressure unit of kPa represents a kilopascal. It is equal to 1000 pascals where a pascal is 1 N/m2. c) How did the values for useful work compare to each other? Does it seem reasonable to state that the area enclosed by a P-V graph has the same value as the direct calculation of the mechanical work done by the heat engine as it lifts a mass? Please compare your two calculations and calculate that percent discrepancy between your results.

Explanation / Answer

a) 0.07644 b) (106.07-103.6 kPa)(1.62-1.32 m^3 ) = 0.741 kN.m

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