Recent content by psyklon

Hi, I'm working on a problem that requires me to calculate thermal energy (kT) at different temperatures and compare those values to the lowest state energy of a particle in box (1D) of varying lengths. I've calculated the ground-state energies of the electron in all of these different sized...

Hi, Sorry if this is a totally idiotic question, but I was wondering how you can calculate the energy of an electron as the temperature of the surrounding environment is changed. Thanks so much!

Homework Statement The problem I'm attempting to solve asks you to evaluate the function at a given point. In this case: ln(x + sqrt[1+x2] ) - sin(x) @ x = .001 Homework Equations sin(x) = x - (x3/3!) + (x5/5!) - (x7/7!) + ... AND ln(1 + x) = x - (x2/2) + (x3/3) - (x4/4) + ...

I have to second Mavis Beacon. My mother whipped up a tough typing curriculum the summer before I entered middle school so I sat through an hour of lessons each day for about two months. Good way to learn how to type.

Oh wow! Got it! Thanks again you two, you've been a great help. :blushing:

I want to find the velocity the instant before it hits the ground. I guess I'm misunderstanding the question and I should be finding it for t = 8√2/√g and not trying to figure out how to express a value for time that's an instant before. So, plugging it into the equation I get: v(t) = -...

Well my reasoning was that since it hit the ground at t = 8√2/√g. I would have to put a limit on t to make it very, very close to that but not equal to it since then it would have already hit the ground. I suppose for what I was going for, the limit would have been 8√2/√g. So what time would I...

Homework Statement When Mongol drops his ball off the Hasselbluff Mountain Viewpoint, its height above the ground at time t is given by h = 64 - 1/2gt2. How long will the ball take to hit the ground? How fast is the ball going the instant before it hits the ground? Homework Equations I...

Awesome resource! Thanks! It's a great video for ensuring that you have the material down.

Thanks, LURCH. That definitely cleared up the issue for me. :biggrin:

Hello, I have a quick question regarding an http://www.sciencenews.org/view/generic/id/38466/title/Blueprint_to_repel_oil_and_water" that I just read on ScienceNews regarding hydrophobic surfaces. In the second to last paragraph it's quoted that "although hydrophobic surfaces readily shed...

I performed a search for "productivity versus age," no quotes, on Google Scholar and came up with the attached report by Cesare Marchetti. In addition, I've attached an excerpt on creativity from the Encyclopedia of Aging (2002) that discusses the indicators of productivity and includes a...