Physics question.

My guess i sthat given you are out by order of magnitude not the value (mantissa is correct, exponent is wrong) that you check the units you plugged into the formula.

I notice that the Y axis is in cm cubed not m cubed. 11.2 cm3 is 11.2/(100*100*100) m3 or 11.2*10^-6 (not 11.2x10-2 as you had) there is a factor of 4 orders of magnitude that you are missing.
 
Since your answer is out by a factor of four and you used v = 11.2x10-2 m3 instead of 11.2x10-6 m3 that would explain where the error is?

(I'm only guessing since it won't let me download the exam paper atm)


Edit: Now downloaded it and that is definately where your error is. I don't remember Physics a-level being that easy? Maybe the degree had something to do with it.
 
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georges said:
Yeah, I was doing the same.. sadly I have a banging headache so I had to give up.
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I'm just trying to learn all the equations and main marking points. It seems with physics all I am learning these days is how to do the exams, because the mark schemes are so ridiculously pedantic and so much stuff is crammed into one module. It's impossible for me to really understand quite a bit of the actual physics.
 
Energize said:
I'm just trying to learn all the equations and main marking points. It seems with physics all I am learning these days is how to do the exams, because the mark schemes are so ridiculously pedantic and so much stuff is crammed into one module. It's impossible for me to really understand quite a bit of the actual physics.
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Yep. Most of the paper you can blag just from the formula books. There's just a couple of things thrown into the mark scheme which have to be learnt and that's it.
 
Does anyone know how to rearrange the exponential discharge equation v1=v0*e^-t/r*c in terms of -t? It's beyond my mathematical ability. :p
 
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