Chemistry and Physics AS paper 12 MCQS

[salvatore]

Some help please? Can you explain this to me?
Q29, November 2011, Variant 13.

View attachment 28784

The answer is C
There is constant phase difference along the line RS (Since the waves are coherent) and therefore, there will be no interference.

 

[LeoMessi]

Paper 12.

Q5:

x= 1.28-0.83 = 0.44
Error in x = 0.02 + 0.01 = 0.03
Uncertainty= 0.03/0.44 * 100 = 6.88
Answer D.

Q14:

Length of Ramp= 1.5/sin30 = 3m
Work Done against Friction = 150*3 = 450 J
Work done against Gravity = 200*1.5 = 300

total= 450+300 = 750 J

Thank you so much. God bless you and may your exam be really great.

 

[code11]

yar any one tell me about question 12
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_11.pdf

 

[LeoMessi]

yar any one tell me about question 12
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_11.pdf

In case of pulleys use the following formula to find the acceleration
a= g[M - m] / [M+m]
M stands for the larger mass and m stands for the smaller mass

If you want to find tension use the following formula

T= (2Mm/M+m) *g

 

[IGCSEstudent2012]

http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w08_qp_1.pdf
QUESTION 11 AND 34 PLEASE

 

[salvatore]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_1.pdf

QUESTION 11 AND 34 PLEASE

(11) Here is the equation for this question: F - R = ma.
F = The force used to accelerate the body
R = Resistive force (Friction)
m = Total mass
a = acceleration

The accelerating force is provided by the 2kg mass. Hence, F = (2 x 9.81) = 19.62N

19.62 - 6 = 10a
a = 1.362 m/s

(34) The starter motor requires a charge of:
Q = It
= 200 x 2
= 400 C

The total charge that the battery can supply is 100000 C.

So how many times can all the charge be drained from the battery if 400C is required for each start?
=> 100000 / 400
=> 250

Hope that helped

 

[1597.2217]

Thank you and thnkss for your tym but i didn't understand ""moles = 3.29 (2x (14+16+16) + 16) = 0.03046 Moles"" what is this Mr isn't it total Mr of the two gases No2 and O2 which is supposed to be ( 14+16+16)+(16+16)=78 ??? pls answer and thnkss again

Because 2 Mole of Salt gives 4 Mole of NO2 and 1 mole of O2. We need to calculate for 1 mole of salt, so all the moles will get divided by two. Hence we took the Mr for 2 moles of NO2 and 0.5 mole of O2. Hope you get it

 

[Aries_95]

We add the 2 because there are two parts of wire with tention?

Yeah. Since we have to calculate the tension in the wire and the wire is sort of divided into two parts.

 

[IGCSEstudent2012]

(11) Here is the equation for this question: F - R = ma.
F = The force used to accelerate the body
R = Resistive force (Friction)
m = Total mass
a = acceleration

The accelerating force is provided by the 2kg mass. Hence, F = (2 x 9.81) = 19.62N

19.62 - 6 = 10a
a = 1.362 m/s

(34) The starter motor requires a charge of:
Q = It
= 200 x 2
= 400 C

The total charge that the battery can supply is 100000 C.

So how many times can all the charge be drained from the battery if 400C is required for each start?
=> 100000 / 400
=> 250

Hope that helped

Thanks..it helped!

 

[abdullah100]

This is a tough question i need help.
9701_s12_qp_12.pdf Q7
9701_w08_qp_1.pdf Q30
9701_s11_qp_12.pdf Q11

 

[IGCSEstudent2012]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_12.pdf

question 17 and 16 please.....thnx
1597.2217

 

[daisyy]

hey can anyone please help me in Question number 20 http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s06_qp_1.pdf Thank uu!

 

[daisyy]

I also need help in question number 12 Oct/Nov 2005 Thanks guys!

 

[stareaj]

Physic As oct 2010 / 12 mcq 22 and 34
May 2011/12 mcq 15,16,24
Pleaseeeee tellll

 

[kingos3111]

Which molecule has the largest overall dipole?

 

[kingos3111]

9701/12
Paper 1 Multiple Choice May/June 2012

 

[kingos3111]

20 Use of the Data Booklet is relevant to this question.
A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.
Out of the total mass of products obtained, what is the percentage by mass of each product?
A 32.4 % and 67.6 %
B 38.3 % and 61.7 %
C 42.3 % and 57.7 %
D 50.0 % and 50.0 %

 

[1597.2217]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_12.pdf

question 17 and 16 please.....thnx
1597.2217

I will get back to you tomorrow. I have Physics P1 and need to work for it. I would be happy to solve any Physics questions anyone has. Just tag me.

 

[IGCSEstudent2012]

I will get back to you tomorrow. I have Physics P1 and need to work for it. I would be happy to solve any Physics questions anyone has. Just tag me.

1597.2217 this is physics...cx i also have p1 tomorrow.

 

[stareaj]

I will get back to you tomorrow. I have Physics P1 and need to work for it. I would be happy to solve any Physics questions anyone has. Just tag me.

Somebody please helppppppppp these are my problems don't have any link pls
Physic As oct 2010 / 12 mcq 22 and 34
May 2011/12 mcq 15,16,24
May 2011/ mcq 14,15
Oct2011/13 mcq 17,25
Oct 2011/12 mcq 26
May 2012/12 mcq 5