Qualification > Sciences
Physics Paper4
Sue T:
thank you Ari Ben Canaan
--- Quote from: ruby92 on May 09, 2011, 07:55:55 pm ---M/j 2006 4(c), Q7 (a) and (b)
--- End quote ---
7 a nd b ) cant help with a sorry - wen i asked my teacher he simply said tht i shod no it...
so b) since electrons behave as waves, they get diffracted by the carbon which acts as a diffraction grating. the atoms in the carbons form rows and columns. The spaces between the columns are regularly spaced just like a diffraction grating - this causes the appearance of a central maxima and interference maximas on both sides of it. Then the atoms are also in rows with regular spaces. These give interference maxima above and below the previous central maxima - so you end up with shape 1 in the attachment (very rough sketch)
now there all several jumbled up layers of the atoms just described. so look at the second attachment - you end up with concentric circles as ur diffraction pattern
Sue T:
--- Quote from: ruby92 on May 10, 2011, 11:16:06 am ---Thank you :)
could you attached the working for the m/j 2004 question?
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yasser37:
can anyone explain question 5
November 02
parts a and b
how do we put the capacitors and why please :)
thx
Sue T:
--- Quote from: yasser37 on May 10, 2011, 12:09:43 pm ---can anyone explain question 5
November 02
parts a and b
how do we put the capacitors and why please :)
thx
--- End quote ---
thecandydoll:
i have come across certain places that 2*E(kinecticenergy) = change in potential energy?
howww?
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