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ALL PHYSICS DOUBTS - POST HERE !!
Ghost Of Highbury:
--- Quote from: Ivo on May 26, 2010, 06:23:50 pm ---OK thanks a lot A@di, very clear explanation. Just wanted to know how to explain, for same paper and question, part b)i), I know the volume increases when temp. increases, but is it because gas molecules expand and so become less dense, so occupy larger volume, or is it because kinetic energy of mol. are greater, therefore more hits with molecules.
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the MOLECULES dont expand, their intermolecular SPACE increases because as they have more KE.
Ivo:
--- Quote from: A@di on May 26, 2010, 06:27:57 pm ---the MOLECULES dont expand, their intermolecular SPACE increases because as they have more KE.
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OK, so let's clear this up:
Expansion: is due to the expansion of gas (molecules get further apart) and forces the piston out, as the volume increases.
Pressure: an increase in pressure is due to molecules gaining more ke and so hit the sides more frequently and with more force, so pressure increases.
However, I don't know how to explain the relationship of volume with pressure for constant temperature. Please explain.
Ghost Of Highbury:
--- Quote from: ambitious94 on May 26, 2010, 06:26:15 pm ---Can anyone plzzzzzzzzzzzzzzzzzzzz plzzzzzzzzzzzzzzz explain me June 09 Q 11 b!!!
Whoever predicted we're screwed wasnt lying! XD
I havent actually studied the portion! UGHHHH
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SHould be perpendicular to the magnetic field. Negative plate opposite the deflection. So that the alpha particle gets attracted to the negative and cancels the deflection..
@Ivo = When pressure increases , volume decreases. Consider a syringe, if u apply pressure, the volume of air in the syringe decreases...inversely propotional
Ghost Of Highbury:
--- Quote from: M'i'D'o on May 26, 2010, 06:25:34 pm ---hey everyone....
what is the GREATEST danger if there is a wire kept uninsulated in a room ??
is it fire or electric shock or any other ??
plz reply fast
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Electric shock?
Malak:
Q9 part c All
thx
http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_32.pdf
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