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seen Dec 11 at 20:45

Dec
11
awarded  Commentator
Dec
11
comment Location of heat conversion in heat engines
But the equalized temperature would be lower, if compared to a system where there is no piston, and the temperature just equals out by itself?
Dec
11
comment Location of heat conversion in heat engines
Like it was taught in school, I thought that any energy becomes heat some time, and can not be converted to any other energy back. However, as you said, the total amount of heat may decrease. If the heat stored in a fire and the heat in it's environment are added, they come out for more heat, as if the heat of the fire funneled to a piston and the heat of the piston's environment is added, after the piston is moved. So concentrated heat seems more valuable than spread heat, and spreading heat may reduce the total amount of heat stored, if done well (by a moving piston).
Nov
20
asked Location of heat conversion in heat engines
Apr
1
comment Equal hourglass levels blindly
Sadly, this even won't work at all. There is less sand as one full bulb in total in the glass, so the level would equalize just until it drops below the passage in both bulbs.
Apr
1
comment Equal hourglass levels blindly
The shaking idea sounds plausible. However, trying it on a real hourglass revealed that the sand is quite stable in a certain position, thus it moves in short intervals and calms down inbetween. Using a strong vibration or constant quite agressive knocking on the glass would give the desired result it seems... but this is not so practical as it takes a long time of aggressive movement.
Apr
1
awarded  Editor
Apr
1
revised Equal hourglass levels blindly
added some examples to give some clue what I'm looking for
Mar
27
asked Equal hourglass levels blindly
Feb
20
asked Bottom magnetic levitation
Nov
5
comment diesel steam engine
The question is more about if the engine could be driven by external heat instead internal combustion... It is part of the idea to heat up the cylinders by external combustion, by fuel, gas or wood...
Nov
4
asked diesel steam engine
Aug
24
awarded  Scholar
Aug
24
accepted light ray 'entropy'
Aug
15
awarded  Nice Question
Feb
17
asked Erratic light spot in optical projection
Feb
17
comment maximum positive electric charge of solid body
What kind of setup could achieve that charges?
Aug
18
comment maximum positive electric charge of solid body
Are those $Vm^{-1}$ values theoretical ones or in reach for experimental techniques?
Aug
18
asked maximum positive electric charge of solid body
Aug
16
answered Why we don't see long range airborne CO2 lasers?