Physics - December 2006

2006-12-31 06:47:17 · 21 answers · asked by maulipatel96 2

Hi looking over my physics notes and they are sketchy at best any help filling in all or some of the gaps would be appreciated.
1) Concerning thermal transmittance through composite walls, why must the heat flow be the same through each section of wall?
2) Molar heat capacity at constant volume = dU/dT this seemed to appear at random not sure what U refers to at all? pe? any ideas
3)on the exponential atmosphere
I have the formula p(h)=p[h=0].exp(-mgh/kT) then i have kT/mg=h[0]=8041 at 273. Unsure how you get to this from the formula and no idea where 8041comes from (could it be a given value? was under the impression h[0] was sea level though). desperate for help on this one
4)Is decreasing air pressure with increased height down to lack of high mass molecules or less air above you or a combination of both?
5) Finally a bit of a long shot but on intermolecular potential I have that notation that F is 2nd derivative of U w.r.t r evaluated at a. then written next to it (r-a)?

2006-12-31 06:14:46 · 3 answers · asked by Philip J 2

A friend of mine who once lived on a hill overlooking the freeway said that the noise was much louder on the hill than next to the freeway. Is this so? There was a concrete wall on both sides of the freeway. Perhaps someone with a strong physics background can answer this.

2006-12-31 05:21:41 · 4 answers · asked by Philippe 3

2006-12-31 05:16:05 · 9 answers · asked by don Pedro 2nd 1

i heard that if the energy in an object increases, so does its mass. Thus it is impossible to accelerate an object to the speed of light because due to the extreme kinetic energy, the mass is close to infinity. is this true or is there a different hypothesis to this?

2006-12-31 04:09:41 · 10 answers · asked by adi_trivium 1

2006-12-31 03:55:43 · 4 answers · asked by adi_trivium 1

2006-12-31 03:16:36 · 6 answers · asked by rik b 1

My book says heat developed in a resistor is I^2 R, where I is the current and R the resistor,

can anyone please explain how this formula was derived?
Thanks

2006-12-31 02:56:30 · 7 answers · asked by ishisgreat 1

2006-12-31 02:22:31 · 12 answers · asked by Anonymous

At present antimatter only exist in the super colliders of Universities. I believe antimatter is the energy between the Negative and Positive of any magnetic field. As per example: hold a bar magnet or for that matter a ring magnet in hand and try to hold a steel blade in the area between the two edges. The blade will go to Negative or Positive. Try as you may, there is no nuetral. Conclusion is that there is an energy that is invisible and without matter. Dark-matter perhaps, or all the missing matter of the Universe that Science can not explain. Devices have been built that "run" as a matter to sugest, Mobility based upon this un recognized phenomina of nature. This energy has no need for thermodynamics or gravity as a means of perpetuating a working machine. It surely answers a few questions that have been in the minds of many learned people. The Trinity of Negative & Positive is to know the power of '&' the Helix. Simple science reminds us that all matter is of solid, liquid or gas

2006-12-31 02:10:56 · 4 answers · asked by blueridgemotors 6

it is a question from electricity.

2006-12-31 02:07:14 · 7 answers · asked by Anonymous

2006-12-31 02:06:07 · 13 answers · asked by TheOne 1

2006-12-31 01:19:53 · 3 answers · asked by prs1145 1

We normally are aware of the fact tha two like charges repel each other but can it be possible that they attract each other ?
All the people with some sort of scientific mind please answer
its a request!!!!!!!!!!!!.

2006-12-31 01:18:20 · 20 answers · asked by dove 1

2006-12-31 01:03:49 · 3 answers · asked by prs1145 1

I was told that in a window when time passes the glass will start falling and making a glass thing on the bottom of the window something like that

2006-12-30 23:46:27 · 17 answers · asked by pill0o 1

2006-12-30 23:39:52 · 7 answers · asked by Anonymous

I like this question. Nobody knows the answer but me.

2006-12-30 23:15:21 · 15 answers · asked by wwwwwwwfe 1

I felt something 'zap' me when i touched the back of the TV when it was on. I think its charged up static electricity. Weak but I'm sure there's something. Can anyone help?

2006-12-30 22:36:51 · 13 answers · asked by Save_Us.925 2

2006-12-30 22:27:34 · 14 answers · asked by archanpagedar 1

2006-12-30 22:07:11 · 14 answers · asked by Anonymous

2006-12-30 21:24:19 · 13 answers · asked by parameswar k 2

2006-12-30 21:09:22 · 5 answers · asked by Anonymous

2006-12-30 20:57:55 · 15 answers · asked by billdoe 3

what would happen if a really powerful laser was shone on a mirror?

2006-12-30 20:48:05 · 10 answers · asked by Anonymous

me and another person were listening to two separate radios in adjacent rooms. I had a plasma light (sphere shapped novetly lamp) in my room. When I turned the lamp on, the radio in the other persons room became very staticy- but not the radio in the room containing the lamp. When the lamp was brought into the other room, the radio in my room had the same static noise. Do you have any explanation for this?

2006-12-30 19:30:50 · 2 answers · asked by carr0t 1

As light bright sunlight can burn a deaf person's skin,they cannot hear....Tom Science 4

2006-12-30 19:19:20 · 10 answers · asked by Anonymous

2006-12-30 19:00:28 · 5 answers · asked by carr0t 1

i have to make one for my physics project. it has to throw a tennis ball like 15-20 feet.

2006-12-30 18:31:24 · 6 answers · asked by Anonymous

Could someone explain renormalization in quantum field theory? You may assume that I have a (very) rough understanding of what quantum field theory is. And no wikipedia excerpts please!

2006-12-30 18:00:41 · 3 answers · asked by robert 3