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IGCSE PHYSICS

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wassup:

--- Quote from: @d!_†oX!© on November 08, 2009, 03:01:58 pm ---hey wassup check this out, direct from the er:
Question 4
(a) The confusion between particles and molecules was less common than with previous questions on
this topic. However there were considerable numbers of candidates who thought that the dust
particles were “lighter than the heavy air molecules”. Many answers were spoilt by extending this
wrong concept to “fast moving dust particles colliding with air molecules”. However, there were
many excellent answers seen.
(b) Large numbers of fully correct answers were seen, generally well set out and with all the working
shown. The most common error was the use of 2 x 25/80 instead of 2 x 80/25.
Answer: (b) 6.4 x 105 Pa.

--- End quote ---

thanks adi

@d!_†oX!©:
anytime wassup!!

Mari mc:
do we need to know the formulas for paper 3?

Ghost Of Highbury:
of course. its a theory paper. u have to know everything.

@d!_†oX!©:
of course u need to!!!!!!!!!!! :o :o

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