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seen Jun 21 at 9:07

Jun
21
comment Biological heat dissipation methods
Summarized, if ground, air, and cloud cover have 38 degree and humidity is 100%, one will die.
Jun
21
comment Biological heat dissipation methods
If I get it right, all methods mentioned despite sweating require some matter that is colder than the body. For heat transfer to air, it has to be colder. For transfer by radiation, the visible environment has to be colder. This is actually the most likely one I consider, as with a clear sky, the environment partially consist of deep space, which is extremely cold, and the sun, which is extremely hot, but it's radiation is almost parallel and can be blocked easily. However, with humidities about 100% the sky would be more likely occluded. It would have a high temperature then too.
Jun
19
asked Biological heat dissipation methods
Jun
3
comment Gravity effect on moving bodies
So we can expect the change of gravity forces in one position depend on the change of their sources in a wave propagating manner, but the effect itself in one place is not affected by the speed of movement of a body in this field? So if I suddenly move the sun more far away from earth, earth would feel the change with about 8min delay. But if I move earth a bit, it would feel the change suddenly I guess. This insymmetry depends on the observer, once more, I guess, like if it is fixed to earth or sun.
Jun
2
asked Gravity effect on moving bodies
May
17
comment Ocean surface mean current flow meaning
I don't think so, as there a hundreds of attractors each hundreds of kilometres in diameter. Filtering them out would result in a very rough picture that maybe would not be natural anymore. My guess is, that those attractors themselfes will move by a current on a larger scale on larger timescales. So the monthly mean may show attractors that would not exist on some-year time scales. Particles that would seem trapped by an attractor in a monthly mean may travel with it so they move in larger patterns over the years may hit a coast eventually.
May
17
awarded  Yearling
May
17
awarded  Curious
May
16
asked Ocean surface mean current flow meaning
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...