- Messages
- 224
- Reaction score
- 183
- Points
- 53
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s03_qp_1.pdf
help needed in question 4,8,15,20,22,40 ..... thanks lot
And finally, 20. Now this has to be the toughest question in the whole paper; I still haven't actually figured it out. But from what I understand; the boy applies a pressure which is a tenth of the atmospheric pressure atop the straw.
Which means that p0/10 is the pressure applied. You have to find the length of straw; basically, the h. And the density of the liquid to be pulled up is ρ. So...
p0/10 = ρgh.
h = p0/ρg10.
So the answer should be A... hey, that works! Figured it out, Al-Hamdulillah.