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m = mass of electron (in data sheet. I think it's 9.109x10^-31kg) q = charge on electron (also in data seet. 1.602x10^-19C)

The work done by an electron across a potential difference = the charge*potential difference = change in KE so 2500q = 1/2mv^2 (electron gains 4x10^-16J) 5000*q = mv^2 v = [(5000*q)/m]^1/2 v = 2.97*10^7m/s

Couldnt agree more. I always tell my students this. Some of the concepts in the HSC course are interesting, but it order to truly appreciate them, you need to understand the mathematical language of why it is so. I find it very hard to explain certain concepts without delving a bit into the...

me rikey u velly much i love u longtime

I found 01, 02 and 07 w/ solutions Good papers :)

I think i have a few NEAP papers somewhere, ill try find them

welcome to last year :)

E = (6.626x10^-34)*(102.8x10^6) [Mega = 10^6] E = 6.812x10^-26J that's it answer is wrong We wouldnt live to long if each photon of a radio wave had 680J of energy as the answer suggests :) U have UAI Aim of 98 and u dont know what M means!?!?!?!?! AYE AYE AYE!!! :P

Financial Reporting And Analysis - HD (87) Companies and Securities Law - HD (93) pwned

Well, really it's the vibrations (phonons) which cause the superconductivity! But "effectively" the lattice has stopped vibrating, except for these phonons.. Which are really happening everywhere, all the time! (AAAARGGGGGGGGGGGGGGHHH! This is why i hate simplified Physics!) This reminds me of...

Basically, Type 1 can be explained by the BCS theory -- In the real BCS theory the distance between the "Cooper Pair" electrons is 100-1000 atomic spacings. At these distances there is minimal electrostatic repulsion between the two electrons. Type 2 cant be explained by BCS theory -- Cooper...

In order to correctly describe BCS theory, you need to delve into wave functions (i.e., quantum physics) What is needed to be known for full marks in the HSC is over simplified and some is actually incorrect. All that needs to be said to get full marks would be: - Electron travels through the...

According to the BCS theory, when a superconductor is cooled to below the critical temperature, the very low thermal energy leads to a quantum state where an electron can lead to a distortion in the lattice of positive nuclei to give rise to a localized positive region, which attracts a second...

Q2Q is quite easy. Half of the stuff in Q2Q was in I2I in the old syllabus :) It ties in well, plus its interesting :D

Heh, you goto Bossley Park High? Do u know a Crystal Olivares? Think about what resistance is (opposition to electron flow). In conductors, lattice vibrations increase when you increase the temperature of the conductor (as you are increasing the thermal energy available to the crystal...

Higher wavelength means lower energy Power is simply a measurement of energy in a certain time interval. If they both have the same power, then they both have the same energy emitted in a time interval. If red light has a lower energy per photon (due to lower frequency), then there will be...

http://blogs.usyd.edu.au/ptf/Superconductivity.pdf check it out :)

Phonons are to do with quantised vibrational energy in a crystal lattice Don't really need to know much about them in I2I, perhaps when you look at the BCS theory (depending on how in depth u wanna go) An excellent resource on superconductors is posted by a friend, Joe Khachan from USYD...

Best way to do it is by using an electroscope, a rod (ebonite, perspex, PVC) and the associated material to rub it with (Fur or silk). Rub the rod with the material to build up a negative charge on the rod, transfer this charge to the electroscope, depending on which kind you have you will see...

I really suppose it would depend on what branch of nano you intended on doing. If you were to go into the materials side, then yep, chemistry would be essential! But if you are looking into stuff like optics, photonics, engineering etc... It really wouldnt be neccesary, but would help i'd...