389 reputation
27
bio website
location Israel
age 34
visits member for 2 years, 11 months
seen Oct 6 '13 at 9:59

Nov
15
comment How do derive this result in stat-mech style
Thanks. Reading your answer I realized that I took the wrong derivative. It is bound to happen if you try and solve stuff when you are tired.
Nov
15
asked How do derive this result in stat-mech style
Oct
31
revised Finding two dimensional critical point
I re-read the relevant part of the article and update the definition of $\chi$. I thought it was the interaction energy between the two layers but this is the interaction between two lipids
Oct
31
asked Finding two dimensional critical point
Oct
29
comment Depalma Free Energy fields
So, it could possibly exist some matter configuration in which some energy signatures could be measured. Unless there is some unexplained measurement that can only be explained by adding some other matter configuration, there is no reason for us to assume this. Who knows, maybe we are all, in effect on a back of a tortuous traveling through space, without any evidence, there is no reason to assume so. Button line, you think this is the case? Give us some evidence. This year Noble price in chemistry is exactly about that.
Oct
18
comment Can someone explain the color Pink to me?
You are right, what I should have explained is that our mind place each light we see on the appropriate position in it's red-green range and the blue-yellow range and this is why this are two kinds of color blind. The cell class I took was so long ago...
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.
Oct
18
comment Can someone explain the color Pink to me?
Could you be referring to this? en.wikipedia.org/wiki/Technicolor
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.
Oct
17
answered Can someone explain the color Pink to me?
Oct
11
comment How to get distance when acceleration is not constant?
You add stuff to the equation until you reach a constant value
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.
Oct
9
answered Could hydrogen liberated from water provide lifting energy which exceeds the energy it took to liberate it from water
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.
Sep
20
answered How does the earth move?
Aug
15
answered Where does the excess energy emitted by a microwave go?
Aug
8
accepted How much solar energy hits a rooftop in Israel?
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.)?
Aug
7
awarded  Commentator
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...