Long explanation. Just memorise the answer.Y is da answer not c but d???
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Long explanation. Just memorise the answer.Y is da answer not c but d???
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can someone please help me with Q 12,19,27,30,36 from Winter 2012 ...... http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_12.pdf
Y is da answer not c but d???
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Q4-
LHS = RHS
The units must be cancelled out so that nothing remains. First, you cancel out all the constants:
L x 1/P = Q x T^2 [We know L is m and T is s]
m x 1/P = Q x s^2 [To cancel the s^2, Q must have s^-2]
Now substitute the units given in options:
(B) m x m^-2 = m x s^-2 x s
Giving m = m
Q5-
Basically what they are asking is to first find the PERCENTAGE UNCERTAINTY. Eg, for A- 0.002/2.043 x 100% gives 0.097%.
Find out for other options. You will see that B- has 3.7% and D- has 3.85%. But it doesn't end here. (B) is d, and in the equation the d is multiplied by d again. So multiply the uncertainty giving you value greater than (D).
Q15-
Total AC moment = Total C moment.
The rings are of same mass.
7xm + Yxm = 5x2m [Subs m as 1 for simplicity]
7 + y = 10
y = 3
[8 from pivot minus 3 = 5.]
Ans is hence (C)
Good luck tomorrow. Remember me in yours prayers please.
#9: V^2=U^2 + 2 as
#13Could someone please help me with may/June/12/2012 pleasee.
Mcq no 13,18 and 24.
Here's a link to the paper: http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_12.pdf
#13
F(net force) = ma
F(net) = 2x9.81(the weight) - 6(friction) = 13.62
total mass = 8+2 = 10
F=ma
A=F/M = 13.62/10 = 1.4 so answer is A
#18
efficiency = output power/input power
in this case its a generator so output power is P=VI = 230 x 32=7360
input power = E(potential) / time = Mgh/t = 200 x 8 x 9.81 = 15696
efficency = 7360/15696 x 100%=47% answer is D
#24
simply find the area inclosed by the graph and x = 0 to x= 7mm
wierd, I just did calculation again and it is B.Thankyou so much. On the last mcq however the answer I get is A whereas the mark scheme says B :/
17 is a because only that body cannot stay in that position ie it will move down the slope.
17 is a because only that body cannot stay in that position ie it will move down the slope.
No clue about 18 though
But which app is this ?
ok first you find the wavelength λ which is 2x the distance between 2 antinodes X and Y. sohttp://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_12.pdf
Ok so I'm done with every single thing except this question which is literally haunting me :'( plzzz plzzzz plzzzz if some1 knows it answers it pleaseeeeee it's Q:30
The question states that "X is measured with a percentage uncertainty of ±1 % of its value at all temperatures." meaning that the percentage uncertainty is unchanged, so A and B is eliminated.http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_11.pdf
Question 6
This is the only problem i have out of the entire Question Paper someone please solve this thanks
The question states that "X is measured with a percentage uncertainty of ±1 % of its value at all temperatures." meaning that the percentage uncertainty is unchanged, so A and B is eliminated.
then you need to apply some logic here, will the actual uncertainty get bigger as you approach 100 or 0?.
you can quickly do some math here, 100x1% = ±1 uncertainty while 0x1% = 0
so answer is C, least actual uncertainty when temperature close to 0
The question states that "X is measured with a percentage uncertainty of ±1 % of its value at all temperatures." meaning that the percentage uncertainty is unchanged, so A and B is eliminated.
then you need to apply some logic here, will the actual uncertainty get bigger as you approach 100 or 0?.
you can quickly do some math here, 100x1% = ±1 uncertainty while 0x1% = 0
so answer is C, least actual uncertainty when temperature close to 0
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