network profile
| bio | website | |
|---|---|---|
| location | Israel | |
| age | 33 | |
| visits | member for | 2 years |
| seen | Dec 20 '12 at 6:10 | |
| stats | profile views | 71 |
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Oct 18 |
comment |
Why is the sun so dense? I don't know enough about this for a complete answer but to my understanding, the sun is bright because it is dens. The high concentration of particles caused them to fall one toward the other releasing. The more matter there is, the stronger the gravity and the more dense the star will be. Most of the stars you see at night are suns which are very dense. |
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Oct 18 |
comment |
Can someone explain the color Pink to me? Could you be referring to this? en.wikipedia.org/wiki/Technicolor |
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Oct 17 |
comment |
Does the speed of sand flow in a hourglass depend on a height of a sand column above the hourglass neck? If there is one thing you can't do is compare the sand to fluid. Sand might get stuck in a sharp slopes which fluid will flow easily. There is a whole engineering field about this topic. |
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Oct 17 |
answered | Can someone explain the color Pink to me? |
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Oct 11 |
comment |
Distance when acceleration not constant You add stuff to the equation until you reach a constant value |
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Oct 9 |
comment |
Could hydrogen liberated from water provide lifting energy which exceeds the energy it took to liberate it from water @Phil: But what you are saying here is already done. Look for geothermal energy. |
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Oct 9 |
answered | Could hydrogen liberated from water provide lifting energy which exceeds the energy it took to liberate it from water |
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Oct 5 |
comment |
Why can I tell a flute from a trumpet? To put it in plain words. The reason you can easily distinguish between instruments is mostly the difference in the imperfections in the generated waves. |
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Sep 20 |
answered | How does the earth move? |
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Aug 15 |
answered | Where does the excess energy emitted by a microwave go? |
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Aug 8 |
accepted | How much solar energy hits a rooftop in Israel? |
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Aug 8 |
comment |
How much solar energy hits a rooftop in Israel? Those are the figures that sound more reasonable to me. Does that includes any loses (maintenance, excess heat, etc.)? |
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Aug 7 |
awarded | Commentator |
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Aug 7 |
comment |
How much solar energy hits a rooftop in Israel? What mostly bother me is the estimated loss. The numbers I know is that less than 15% of the light is converted to electrical energy. I was in a lecture lately which stated that due to a cycle which is much similar to Carnot cycle, the most efficient system will be transfer less than 30% of the light to usable energy. This is why I want to know the raw data, how much light hits the earth in my region and not the calculations... |
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Aug 7 |
comment |
How much solar energy hits a rooftop in Israel? is this number for the amount of energy produced or arriving? What area are they relevant to square meter or square foot? Where did you got this number from? |
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Aug 7 |
asked | How much solar energy hits a rooftop in Israel? |
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Aug 7 |
comment |
Helmholtz Free Energy relation I'm not sure about your question here. All I can tell you is that the pressure part comes out of the definition of work (consider the ideal gas case). As for the chemical potential ($\mu$), this is just a name. pressure and entropy where defined before the realization of of statistical mechanics so they are described in other, more commonly known equations. |
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Aug 4 |
comment |
How can a laser pointer have range of several kilometers in atmosphere? I don't think that the test is carried in the atmosphere. I suspect it is carried in a clean and dry room (possibly, under vacuum) and use mirrors. This is much like the tests for batteries which are carried under ideal conditions (temperature, humidity etc.) |
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Jul 28 |
answered | How does gravity affect sound waves? |
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Jul 17 |
accepted | Electric field outside a capacitor |
