# Search results

1. ### Cyclotron exit energy

So, i'm beggining to work in a cylcotron as operator. Most of the crew here has technical education, albeit not quite a physics degree. When i asked what's the distribution of energies of the particles when they hit the target i got a blank look. How could i determine this? I'm guessing that...

it's been said on the lab today that maybe the lab work we're doing (i'm an undergrad, 4th year of physics) could be honed into a publication.. my lab partner was really excited about it, but i had my doubts because i don't know what are the future consequences of doing this. i never trust...
3. ### Enthalpy of ideal gas

Hello. I'm having troubles solving the enthalpy for an ideal gas. From the equation H=U+PV, i could find H substituting PV=NRT = U/c, but then i need the energy as a function of S and P, so i'd get H as a function of its proper variables (S and P).. I can't find such an expression. It's just...
4. ### All purpose pump

hi, i've been inspired by this wind generator design: http://www.instructables.com/id/Pringles-Wind-Turbine-Pleech---Version-One/ to make it operate in reverse, that is, feed alternating current and make the thing spin. The purpose of this is to make a pump by putting a wheel (similar to those...
5. ### Short circuits

so, i'm pretty bored and decided that i want to make a speaker. i've bought some thick copper wire, and twisted it in the form of a coil, then twisted some more with a larger radius so i can put the first one inside the second one and so on.. my motivation to buy the thick wire was to maximize...
6. ### Electromagnetic Momentum and Energy

I've been presented with these concepts, and the first time i saw them i thought they were just mathematical mambo-jumbo, but of course i didn't gave much importance to these thoughts. I've been constructing an idea of these after seeing how they behave in different circumstances, but really, i...
7. ### Getting g such that del dot g = f (given)

Hi, it's not quite a homework question, altought this question came up to mind when i was trying to solve a homework problem. sorry if this shouldn't be here... The thing is this, what are the conditions i should impose to f: R^n -> R in order to be able to find a g, such that [divergence of g...
8. ### How much does a falling object weights ?

how much does a falling object "weights"? Hi ev. the other day i was asked by a friend that does "aerial silk" (http://en.wikipedia.org/wiki/Aerial_silk, just found out it was called that :P) how much (still) weight should the beam (to which the silk is tied) hold in order to hold her weight...