Recent content by coffeem

Homework Statement musical notes are defined by the frequency of oscillation. however notes are usually not qualifies in terms of absolute frequency, but the ratio (called interval) of their frequency to that of a reference notes called root. Pythagorus discovered that intervals that please...

Homework Statement 3 Moles of a monotomatic ideal gas undergo an isothermal (T=50 Degrees Clecius) reversible expansion from a volume of 3m^3 and a pressure P1 to a volume V2 and a pressure P2. The gas does 9.7kJ of work in the expansion. Find: a) the pressure P1 b) The volume V2 c) The...

Yes I know how to integrate functions - just not in this case!

[PLAIN]http://img829.imageshack.us/img829/9453/wrongworking.jpg

Oh... I was using the spherical symetry to really really really simplify the problem... Umm... I will post my working so you can tell me where I am doing wrong! thanks

http://img20.imageshack.us/img20/6278/electricfieldquestion.png [PLAIN][PLAIN]http://img828.imageshack.us/img828/659/electricfieldanswer.jpg I know I have to use Gauss's law... However I am unsure about how I go about this... I've tried doing this on about 3 sheets of paper and have done...

Actuall I think I have managed to work outish a). I used the first law of thermodynamics: E = Q + W then giving that in the question it says: Q(isobarbic)= 200j So since W = -PdV = -P(Vf-Vi) I for internal energy of the syster at this point: U = 185j Am I doing it right?

http://img689.imageshack.us/img689/511/pistonquerstion.jpg This is my part attempt... [PLAIN][PLAIN]http://img830.imageshack.us/img830/7342/internalenergyanswer.jpg And ideas on how I can do the rest of it?

Well - the problem is from a maths exam. And I have two maths books in front of me. Neither of them have anything like this in them. If you know can you please give me some idea of what i need to be reading or looking for? thankyou

Homework Statement [PLAIN]http://img806.imageshack.us/img806/2373/compquesti.jpg The Attempt at a Solution dont know where to start... i know i have to use complex numbers... advice needed please!

Ah... so what I have done is conserves ALL of the kinetic energy! This let's me set up some simultaneous equestions with the momentum and all the kinetic energy conserved. This gives me: v1 = 254.4m/s and v2 =46.2 m/s. does this seem correct (i havnt got the answer!) i can post all...

Im not going to lie. I guessed. Wish to give me a better idea of how to tackle this?

thanks! does the rest of it look ok?

Homework Statement http://img834.imageshack.us/img834/8045/questuinfunny.jpg The Attempt at a Solution [PLAIN][PLAIN]http://img824.imageshack.us/img824/3619/funnyquestion.jpg

Homework Statement http://img155.imageshack.us/img155/7789/questionz.jpg The Attempt at a Solution [PLAIN][PLAIN]http://img826.imageshack.us/img826/1492/myatteptm.jpg NOTE - it said as an aside it was meant to be 8kg and not 18!