Recent content by coffeem

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    Waves question RE combination of frequencies and semitones

    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...
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    OUNT OF HEAT THAT FLOWS DURING THE EXPANSION

    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...
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    Calculating electric field on a long insulating cylinder?

    Yes I know how to integrate functions - just not in this case!
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    Calculating electric field on a long insulating cylinder?

    [PLAIN]http://img829.imageshack.us/img829/9453/wrongworking.jpg
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    Calculating electric field on a long insulating cylinder?

    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
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    Calculating electric field on a long insulating cylinder?

    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...
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    Internal energy and pv diagrams

    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?
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    Internal energy and pv diagrams

    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?
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    Capacitance and resistance question

    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
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    Capacitance and resistance question

    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!
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    Solving Collisions: Homework Help

    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...
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    Solving Collisions: Homework Help

    Im not going to lie. I guessed. Wish to give me a better idea of how to tackle this?
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    Where have i gone wrong with this basic mechanics question?

    thanks! does the rest of it look ok?
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    Solving Collisions: Homework Help

    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
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    Where have i gone wrong with this basic mechanics question?

    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!