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Explain graphically (i) positive work with varying pressure, (ii) negative work with varying pressure, and (iii) positive work at constant pressure. - Physics

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Question

Explain graphically (i) positive work with varying pressure, (ii) negative work with varying pressure, and (iii) positive work at constant pressure. 

Graph
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Solution

  1. p-V diagram showing positive work with varying pressure:

  2. p-V diagram showing negative work with varying pressure:

  3. p-V diagram showing positive work at constant pressure:

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Thermodynamic Process
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Chapter 4: Thermodynamics - Short Answer II

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