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    doped semiconductors question

    hi everyone umm i dont really get the concept of holes/electrons in semiconductors so could someone plz answer this question: why do the holes in a doped semiconductor move in the opposite direction to the electrons? any help would be great thanks :)
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    projectile motion question

    hey guys was jus wondering could someone please help me with this problemm... i havnt done projectile in ages and cant seem to work it out >< thankss in advance :) "A projectile is fired at an angle of 30* to the horizontal from a tower 20m high. the projectile takes 10s to hit the ground...
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    Denise Levertov Poetry Related texts?

    hey i was just wondering does anyone know .. or have any ideas.. on some related texts for this module for levertov's poetry? do the texts have to be specifically about vietnam war and stufF? or can they focus more on the history/memory? any help would be great thanks :)
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    world order

    what are the issues relating to world order? =S
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    Maglev ><

    hey guys! a quick question: do maglev trains (using superconductors) use regenerative braking systems? :S if not, how do they brake? lol >< thanks heaps :D
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    Volume Question - shell method

    oki.. so i hav a test on volumes in 2 days.. and i dnt get how teh heckk i gta do this stufff >< can soemone plz help me out with this qu? The area enclosed by y=x^2 and x=y^2 is rotated about y-axis. Find the volume. thanks veryy muchh! and also if u guys have any tips on how to approach...
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    Optometry - uai needed?

    anyone plannin to do optometry? does anyone know what the required UAI for it is? or umat score? :S
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    Integration

    hey ppl! how do u integrate: 1/ (e^x + e^-x) :confused: ie. (qu 9 in cambridge pg. 175 further ex 5) thanks heaps :D <input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
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    integration by parts qu

    hey guys was wondering how do u integrate: sec³x (sec cubed x) using integration by parts?:confused: thanks heaps =] <input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
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    help = integration problem!

    hey guys ive gotta mental blank...:confused: how do u integrate: 1/(3-x)^2 thanks heaps for the help!! :) <input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
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