- Messages
- 887
- Reaction score
- 466
- Points
- 73
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_13.pdf Q13 need ur help guys
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Can anyone explain to me Q15,17,18,23,29 and 37! Will be much grateful and thank you in advance! http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_12.pdf
power output P=IVCan someone please help with q18....http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_12.pdf
I keep getting 57.5% instead of 47%...i dunno wat i'm doing wrong..
Thnkx!
power output P=IV
23 x 320 =7360 W
power input Power=energy/time
so P=mgh/t
and m/t is= 200 kgs-1
so 200 x 9.81 x 8 =15696 W
output/input x 100
7360/15696=0.468
nd 0.498 x 1ooo =46.8
so answer is D
intial momentum=final momentumOct/Nov 2012 Paper-11 Number-14.
Can someone please explain.
when the trolley is travelling and suddenly sand is added at X so speed decreases and as it passes Y sand is unloaded but trolley wont start running (i mean speed wont increase obvioulsy!)plz explain the scenario at Y. i cant figure it outView attachment 45258
LOL so whats wrong ?http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_12.pdf
in Q26 why can't the answer be A!!
The correct answer is B ._.LOL so whats wrong ?
I know... But Y u dont think its not b ?The correct answer is B ._.
The graph is not amplitude vs wavelength..The correct answer is B ._.
for Q8 why not D ... and Isn't the speed should decrease because as air resistance increase the speed decrease ?8)
you know that gradient of the displacement-time graph is velocity. In this situation, initially, velocity will increase as air resistance acting on it is lesser than acceleration due to gravity and after a while, velocity becomes constant (air resistance=acceleration due to gravity). Bearing this in mind, as initially velocity increases, gradient MUST increase and then when velocity gets constant, gradient becomes constant by implied by the straight line.
10)
F is always in the same direction with a because F is the product of a and a scalar m. Note that v is not always in the same direction with F or a.
you'll think how is that possible? if F and a are in the same direction, shouldn't v be in that direction too?
answer is Let's say we have an object moving to the right, i.e. the vector v is pointing to the right. Then, we pull the object to the left, i,e. F is pointing to the left. This causes the object to have an acceleration in the opposite direction of the initial velocity.
hahahhaaa!! no............!!! Damn it.... think out of the limits...for Q8 why not D ... and Isn't the speed should decrease because as air resistance increase the speed decrease ?
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now