Recent content by epl_manutd

sorry postive y-axis

If an electric field E points in the positive x-axis, then proton will be moving up and electron down. They will meet

I have no idea whatsoever about telescopes. Could you go a bit step by step for #2? Thanks. For #3, the answer is actually C, which confuses me too

Homework Statement A proton sits at coordinates (x; y) = (0; 0), and an electron at (d; h), where d >> h. At time t = 0, a uniform electric field E of unknown magnitude but pointing in the positive y direction is turned on. Assuming that d is large enough that the proton-electron...

oh duh :bugeye: i really suck at thermodynamics

So temperature increase is related to the internal energy increase right? Ok, i understand most of your sol'n, very clear thanks a lot. I'm preparing for the CAP exam which is a Canadian physics contest. I might need your help further down the road. Thanks

i'm very bad at thermodynamics and i need a few sol'ns before i get this topic. So if you can give me the solution, that would be great. I'm not doing this for homework or anything, just preparing for a contest

Homework Statement Two identical balls, A and B, of uniform composition and initially at the same temperature, each absorb exactly the same amount of heat. A is hanging down from the ceiling while B rests on the horizontal floor in the same room. Assuming no subsequent heat loss by the...

hmm, it doesn't get posted try google: "released from rest with its lower end" there is a pdf file that has harvard on it. and it's #11 of that Sorry

that is the link http://polaris.deas.harvard.edu/galileo/images/material/852/151/hw5.pdf

A chain of length L and total mass M is released from rest with its lower end just touching the top of a table, as in figure (a). Find the force exerted by the table on the chain after the chain has fallen through a distance x, as in figure (b). Assume each link comes to rest the instant it...