Recent content by SSJ2

yea, I wish i could have taken the non computer based exam. I do better with pencil and paper on a desk. But oh well ;P. Such is life i suppose.

Is it three? I could be wrong. Have to go back and check.

Thats correct. The PE is the second part of the exam that requires 7 years of experience after you pass the FE or the first part. I got approved to take the first part and got my foot in the door. Did so by having my education evaluated(for a fee) as it is not ABET accredited. You can have yours...

No, not really. Just wanted to let all the physics majors out there know that its possible to become a licensed engineer without a engineering degree depending on state. :) Just took some diligence ;P. Anyways off to start reviewing :).

Just wanted to let the forum know that through some diligence I have been approved to take the Fundamental Engineering test in South Carolina with a B.S. in Physics. I took about a extra year worth of advanced engineering classes along with skipped all freshman and sophomore engineering...

dont forget...when dealing with large numbers its best to include as many sig figs in your calculations as possible, use 9.81 instead of 9.8 and you will get something that you can round to 1.31E7 J

im pretty sure you would do Fnet = F1 + F2 where F1 is the distance from the third charge to one charge F2 is the distance from the third charge to the second point charge oh and the equation you gave is the magnitude remove the absolute value and treat each force as a vector

really, it comes down to the spin of the system. Ferromagnetic implies that all the spin of the electrons point in the same direction. anti-ferromagnetism is when half of the electrons are pointing in the same direction and the other half are pointing in the opposite direction...

i guess i have two questions... 1) the first is although I know the calculation of the number is based around the mass of 12 grams of carbon-12 and that there are 6.02*10^23 atoms here. How was it found that this many atoms of carbon was found in the 12 grams? 2) my second question is...

hmm, i guess in the end i was wondering how the position of the atoms in a fcc structure are determined. i know the lattice parameters are determined experimentally. But how are the positions of the atoms determined

why do the units matter...NaCl has at halite structure...or the atomic positions of (0,0,0) and(.5,.5,.5) in fractional coordinates for the unit cell maybe i didnt explain clearly enough... let me try again So I know that the NaCl unit cell is based on a FCC lattice with a basis of Na Cl atoms...

hi guys i was wondering how the coordination numbers for the atomic positions of atoms in crystals such as NaCl are derived ...more specifically why is Na at (0,0,0) and Cl at (1/2,1/2,1/2) and not (0,0,0) and (1/4,1/4,1/4) of course this is in fractional coordinates