An Amusing Remark on Perpetual Motion Machine (New Fable of Scientific Exploration)[3]
-------------------------------------------------------------③[The second round] (The definitions of Brownian perpetual motion machine agrees with the definition of perpetual motion machine of the second category )

【The second round: A meeting between tiny particles as the cons and Mr. Negation of the second category perpetual motion machine as the pros】

【The pros】: I reaffirm that the second category is a fancied engine impossible to realize, for it keeps absorbing heat from a certain huge physical (such as sea and air) under the condition of no temperature difference and transforming the heat energy into mechanical energy, which has violated the second law of thermodynamics.
【The cons】Only as far as the definition of 【the second category perpetual motion machine】that 【a kind of engine keeps absorbing heat from a certain physical system (such as sea water, and air) under the condition of no temperature difference and transforming the heat energy into mechanical energy 】,we can take the Brownian perpetual motion machine experiment mentioned in the above paragraphs for instance. We take the water in the straight glass tube as an engine, which can not only keep the state of no temperature difference with its surrounding mass system (such as the great material system of the glass tube and air), but also keep conveying mechanical energy (that means doing work forever) to Brownian particles so that they can diffuse and distribute homogeneously in the water keeping a Brownian motion. Thus, it accords with the definition of the second category perpetual motion machine.
【The pros:】The second category perpetual motion machine should be the engine which can keep absorbing heat from a certain material system under the condition of no temperature difference. In the phenomenon you mentioned above, no heat is absorbed. How could it be called the real second category perpetual motion machine?
【The cons:】The sentence in the definition of the second category perpetual motion machine that [it keeps absorbing heat from a certain material system such as sea and air under the condition of no temperature difference] is a limitative condition for the engine’s procedure of absorbing energy. Without this limitation, the engine can’t be called a perpetual motion machine. But the phenomenon that [no heat is absorbed] never surpasses this limitation (which is similar to the situation that passengers taking no articles don’t violate the rule limiting the articles to be taken with no more than 10 Kg), so that it accords with the definition. From another point of view, we can consider Brownian perpetual motion machine as absorbing heat but the quantity is zero (similar examples can be taken randomly in physics such as looking uniform straight-line motion as uniform acceleration straight-line motion with zero acceleration, and looking standstill articles as it in uniform straight-line motion with zero speed, and so on.)
【The pros:】I always think that Brownian perpetual motion machine belongs to the first category. It seems unnecessary to classify it as the second category.
【The cons:】The second category is an engine which can absorb energy.
In fact, Brownian machine is an amphibious perpetual motion machine which absorbs energy but doesn’t consume energy. The emphasis on this point is of great significance to the research on the essence of perpetual motion machine.
【The pros:】Your perpetual motion machine is of some reasons if we only consider the definition of the second category perpetual motion machine. But how could the phenomenon violating the second law of thermodynamics exist? I suggest you meeting the precise Lady Second law of Thermodynamics.
【The cons:】I do appreciate your clear thinking and distinguished and incisive comprehension. Thank you for your reception. The conclusion we have drawn for today is【Brownian perpetual motion machine accords with the definition of the second category perpetual motion machine!】I will go to see Mrs. the Second Law of Thermodynamics after visiting Mr. the First Law of Thermodynamics. Thank you for your direction! Bye-bye!
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