Recent content by amcca064

hahaha just realized that this is what de Broglie wavelength is all about anyways! wave-particle duality. wow, funny

mindscrape - don't need v, need v to find p, or at leaast i thought i needed it until I see that I can do what QuantumCrash suggests... Was not sure if I could use de Broglie wavelength equation WITH Kinetic energy of a particle equation. i.e. Wasn't sure if i could consider electron particle...

Homework Statement Ok, question is: " Calculate the de Broglie wavelength for an electron that has kinetic energy a)50.0 eV b) 50.0 keV and c) 3.00 eV d) What If? A photon has energy 3.00 eV. Find its wavelength. Homework Equations E=hf 1/2 m(v^2) *lambda* = Planck's constant /...

I forget where I've heard this, but I remember hearing once that it was possible that somewhere in our universe an identical version of yourself was living an identical life. I wish I could remember where I heard it so I could explain it better, but I was just wondering if this were possible in...

Well I redid it with g/mol and it still gave me 0 so I think i'll leave it with kg

Should I leave the answer expressed as e^-7.27X10^22 or should i redo with grams per mole?

oh really? ok yeah that makes sense i didn't see in the equation that its n(psi) and not just nv(y). Well if I'm going to use the molecular mass should i use kg/mol or g/mol? I converted to kilograms and used that but i ended up with the ratio equal to e^-7.27X10^22 which my calculator...

Alright thank you! That link was very very helpful in understanding what's going on! The equation given below from that link uses "psi" to represent the potential energy of one molecule, so I think from this that I should find the mass of one molecule and use that in the mgy of my equation...

Ok thanks, but my prof just emailed me and said to skip that part! haha all that was just for fun then. I am still having problems with the question though, I tried finding the ratio, but I am confused for what I should use for m in the equation, should I use the molar mass and find it on a per...

Anybody please?

Assume that the Earth's atmosphere has a uniform temperature of 20ºC and uniform composition, with an effective molar mass of 28.9 g/mol. a) show that the number density of molecules depends on height according to: nv (y) = (n0) e^ -(mgy)/kBT b) commercial jetliners typically cruise at an...

Ok awesome thanks so much!

Ok thanks, that was another way I looked at doing it but I made some serious mistakes when I laid out my eqs... what I have this time is P=F/A and since spring is in equilibrium with force exerted by the gas... P=kh/A Volume = A X h so P1V1/T1 = P2V2/T2 ---> [(101300Pa)(5.00m^3)] / 293K =...

A cylinder is closed by a piston connected to a spring of constant 2.00 X 10^3 N/m. With the spring relaxed, the cylinder is filled with 5.00L of gas at a pressure of 1.00 atm and a temperature of 20.0ºC. A) If the piston has a cross-sectional area of 0.0100 m^2 and neglible mass, how high will...

Help please! anybody...