Mechanical Engineering Exam > Mechanical Engineering Questions > A PMM1 isa)A thermodynamic machineb)A hypothe...
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A PMM1 is
- a)A thermodynamic machine
- b)A hypothetical machine
- c)A real machine
- d)A hypothetical machine whose operation would violate the first law of thermodynamic
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
A PMM1 isa)A thermodynamic machineb)A hypothetical machinec)A real mac...
There can be no machine which would continuously supply mechanical work without some other form of energy disappearing simultaneously. It is fictitious machine.
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A PMM1 isa)A thermodynamic machineb)A hypothetical machinec)A real mac...
Explanation:
A PMM1 or Perpetual Motion Machine of the First Kind is a hypothetical machine that violates the first law of thermodynamics. The first law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. Therefore, a machine that operates perpetually without an external energy source violates this law.
To understand why a PMM1 violates the first law of thermodynamics, consider the following:
- A PMM1 is a machine that produces more energy than it consumes.
- This means that the machine can operate indefinitely without any external energy input.
- According to the first law of thermodynamics, energy cannot be created or destroyed, only transformed.
- Therefore, the energy produced by the PMM1 must come from somewhere.
- Since the machine is not consuming any external energy, the energy must be coming from within the machine itself.
- This violates the first law of thermodynamics, which states that energy cannot be created or destroyed.
In summary, a PMM1 is a hypothetical machine that violates the first law of thermodynamics by operating perpetually without an external energy source. Therefore, it is not a real machine and cannot exist in reality.
A PMM1 or Perpetual Motion Machine of the First Kind is a hypothetical machine that violates the first law of thermodynamics. The first law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. Therefore, a machine that operates perpetually without an external energy source violates this law.
To understand why a PMM1 violates the first law of thermodynamics, consider the following:
- A PMM1 is a machine that produces more energy than it consumes.
- This means that the machine can operate indefinitely without any external energy input.
- According to the first law of thermodynamics, energy cannot be created or destroyed, only transformed.
- Therefore, the energy produced by the PMM1 must come from somewhere.
- Since the machine is not consuming any external energy, the energy must be coming from within the machine itself.
- This violates the first law of thermodynamics, which states that energy cannot be created or destroyed.
In summary, a PMM1 is a hypothetical machine that violates the first law of thermodynamics by operating perpetually without an external energy source. Therefore, it is not a real machine and cannot exist in reality.
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A PMM1 isa)A thermodynamic machineb)A hypothetical machinec)A real machined)A hypothetical machine whose operation would violate the first law of thermodynamicCorrect answer is option 'D'. Can you explain this answer?
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