ben_j_richard's reply history at Help.com

I tohugh they reused them but i didnt think it possible on the same post?

My anon avatar is the same as yours flogger??

PV = nRT

or PV/T= const.

those are simple ones

happy birthday dani :) have a wonderfull day

n! / (n-r)! r!

that is the formula where n=24 and r = 12

well what you do is you define your plane wave inside free space and inside the barrier. you then have to link these waves so they are continuous across the boundaries. you do this by setting the wave equations and their derivatives equal at the boundaries. this gives you a set of equations that link the coefficents of transmission and reflection of the wave and how it behaves inside and outside the boundary.

it would help to know where this question comes from. ie what course and what you have been doing in class recently…..

becasue there are many ways to do it….. im just guessing you want a quantumk mechanical way

wow ok well there is the obvious reason why its transparent….. but your looking for a reason in mathematics

well H[psi]=E[psi] is basically your schodinger wave equation. or you can see it as an eigen value equation where the hamiltonian acts on your states wave function to give the energy E.

of using boundary conditions to do this hmmmm

this question sounds very quantum mechanical in nature….. so let me think……

well i guess you could see the galss as a square well and the wave function as a plane wave. then you could apply the boundary conditions of your square well on the plane wave…… and show that the visible energy spectrum has sufficently high energy to pass over the well…. that would show transmition……………

but the problem of how to define the well potential and what is its magnitude…..

thats how you could do it on a very complex quantum mechanical level……

i cant think of how else to make use of the info you gave

[quote ameliaearthlin]I am usless at all u r good at and probably better at all the stuff u r not so good at lol..
But we have astronomy in common.
I have a telescope, and often look at the stars and planets. although we are on opposite sides of the globe lol

What do think about black holes and time?[/quote]

I like to do that too, i go out at night and look at them see all the constellations. Its nice no matter where i am the sky is always familiar. My favorite thing to see is M31, not easy to see in the city lights, but get outside the city and its great. the first galaxy i learnt to find and being our nearest Andromeda has always had a draw for me :). I must admit iv always wanted to see the stars in the other hemisphere, would feel very alien to me tho :).

Iv learnt lots and done courses about time and space and blackholes :). black holes have always been a facination to people, the idea of an ominous black thing that can eat whole planets and suns….. personally i find them fascinating ideas, not only for the obvious reasons. but because i understand the physics and equations that govern them. Its weird to think of all the strange physical effects that happen around and near them.hawkins radiation being jsut one of them.

Time is also a very strang beast. everyone takes it unshakable as a peroetual fixed thing. but understanding special and general relativity opends up an amazing new way to look at it. :)

was there anything spacific you wanted me to talk about :)

cya luck have a great time

no the k lite codec pack will automatically decode them so you can play them. to encode them you need to donload some video software for compression or encoding etc. you can find lots online.

Hope this helps

Sounds like it might be a codec issue. people use codecs to encode the video and audio, different ones have differnet levels of compression and need different software to decode them. So it quite possible the video or audio of these files are encoded with a codec you dont have. I didnt entirly follow your descriptiobn of how your playing them.

If your playing them on a dvd player then probably not much you can do, other than look for a fim where update.

If your lapying them on your PC then you can download new codecs. Try donloading somthing called the k-lite codec pack. Its free and willgive you every codec you could ever want

hope this helps

yay some support :) lol. But in all seriousness its a hard and intensive job which in order to do really well at you have to put a lot of time in usually at the expense of other things in your life. It can be quite lonely, Its not impossible to have a good social life and relationships as well, but it can be difficult. But then i guess there are other professions the same. From my personal experience i gave up all social life to do well at it….. It was a lonely existance but i did really well. Im trying to find more of a balance tho, so there is hope poster

lol yep sounds right to me. I should know i am one

hi Spike, sorry about taking ages. I have been snowed under with work and other things going on. So my apologies for taking nearly 2 weeks to answer.

ok so IGE is “induced gamma emission”, explanation coming up lol.

ok i dont know if you understand how florescence works, but its easier if you do. Baically excitation of an atoms electron orbitals will cause photons to be produced when they unexcite and fall back down to their original energies. the energy and therefor wavelength of the light depends on the difference in energy.

Now in order to get an energetic enough transition for gamma rays we cant use electron orbitals or vibrational or rotational energy levels. We have to use excited state energy levels of the nucleus itself.

So the neucleus is excited and then wehn it falls back down it creates a photon in the gamma wave length.

very short and waffly description as i dont have loads of time but if you need me to clarify on any part let me know.

Sorry its been so so late.
hope this helps

Ben