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ALL PHYSICS DOUBTS - POST HERE !!
Ghost Of Highbury:
--- Quote from: Ivo on May 26, 2010, 06:05:56 pm ---Hey, please can someone explain how you work out Q6)a)iii) for w09. Link for paper is: http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_31.pdf
--- End quote ---
F = pressure * area.
b4 weights : 1.05 × 105 × 5.0 × 10-3 = 525N
after weights : 1.4 × 105 × 5.0 × 10-3 = 700N
700-525 = 175N
2010:
i cant understand 1 thing...
When gamma cannot be stopped by lead why is it stored in lead containers.....I know that lead reduces the intensity of gamma but it doesn't stop it does it?
Ivo:
--- Quote from: A@di on May 26, 2010, 06:16:11 pm ---F = pressure * area.
b4 weights : 1.05 × 105 × 5.0 × 10-3 = 525N
after weights : 1.4 × 105 × 5.0 × 10-3 = 700N
700-525 = 175N
--- End quote ---
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.
M'i'D'o:
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
ambitious94:
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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