Posted by MarkB_MI on May 24, 2010 at 16:07:39 from (166.203.190.65):
In Reply to: Moderators posted by teddy52food on May 24, 2010 at 10:36:24:
I always shed a tear when a perpetual motion thread gets "poofed". Without a doubt some of the funniest posts on YTMag have been on this topic.
OK, I'll stop chuckling long enough to answer your question: "...all the imput [sic] energy was measured but only part of the output was measured. How can that be a fair test?".
Let's try an analogy: I have a tractor that I hook up to a PTO dynamometer. I measure the tractor's fuel flow, and I measure the output horsepower. Plugging those two numbers into a formula gives me the efficiency of the tractor. Is this a valid test? I think everyone here would say "yes". Did we measure the heat that was lost through the radiator? No. Did we measure the power used to drive the cooling fan and alternator? No. Did we measure the energy lost operating the hydraulic pump or heating the transmission? No. Same thing when you test a perpetual motion machine: You don't get to take credit for energy that's wasted. That's the definition of efficiency: USEFUL Output divided by Input.
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