AS/A2 bio phys chem doubts? Post and I will answer ASAP :D

[Mairaxo]

I have been answering many doubts in different threads so i decided to make this thread for answering all your doubts here! I got straight A's in AS so i wouldnt mind helping you all out

 

[Mairaxo]

okay my thread is an official fail

 

[snowbrood]

okay my thread is an official fail

why are u people making so many threads?

 

[magnesium]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w11_qp_53.pdf
CAN someone tell how to find expected values in Q2

 

[Mairaxo]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_53.pdf
CAN someone tell how to find expected values in Q2

we expected the ratio to be 1:3. 40+72=112 total offsprings. so according to the ratio we expected 28:84 offsprings

 

[Pwincessajwa]

i need help in chem and bio as mcq queshions anyone ?

 

[Suno Yaar]

Do we need to memorize the wavelenghts and frequencies of all the electromagnetic waves and separate wavelengths and frequencies of VIBGYOR?

 

[Suno Yaar]

And I am short of time. Which past papers should I solve? Which are the must-to-do past papers? ANYONE HERE TO ANSWER ME?

 

[Suno Yaar]

question 24. anyone? please solve. http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w05_qp_1.pdf

 

[stareaj]

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

 

[Suno Yaar]

WOULD ANYBODY HELP ME? YOU DUMB CUNTS :/

 

[Mairaxo]

Do we need to memorize the wavelenghts and frequencies of all the electromagnetic waves and separate wavelengths and frequencies of VIBGYOR?

Not VIBGYOR only violet and red .. and all other electromagnetic spectrum

 

[Mairaxo]

And I am short of time. Which past papers should I solve? Which are the must-to-do past papers? ANYONE HERE TO ANSWER ME?

Solve recent ones! The pattern will be more similar if you have less time, start backwards from recent years and do as much as you can! Recent years are harder anyway

 

[Mairaxo]

question 24. anyone? please solve. http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w05_qp_1.pdf

I is directly proportional to f square and a sqaure. a is getting doubled while f gets halved so overall both get cancelled so I is the same. Or use I1/I2 = A1^2/A2^2

 

[Mairaxo]

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

Q22- it has to give reading for a small mass so the low k will stretch more. Low k is in the box so that if a large mass is present, the low k spring doesnt stretch much and is less sensitive.
Q34- V decreases. The gradient should become more positive so its B.
Q15- They should be in opposite directions. So its either B or C. In C both forces are acting at the same point so its not a couple.
Q24- Its B because if there are more springs per unit area, the force is distributed among all the springs so compression is less.

 

[Pwincessajwa]

help me with chem ?

 

[Manobilly]

 

[Mairaxo]

View attachment 28835

Q1 No. of moles multiply by 6.02*10^23 gives u the number of amino acids which is around 1800.
Q2 Find moles of O2 - 500/1000 /24 = 0.02 moles * 6.02*10^23 = option A
Q3 2NaCl + 2H2O --> 2NaOH + Cl2 + H2
only one mole of NaCl is used so one mole of NaOH is formed which is 40 and half H2 is produced which is 1 and half Cl2 which is 35.5 so its A

 

[Suno Yaar]

I is directly proportional to f square and a sqaure. a is getting doubled while f gets halved so overall both get cancelled so I is the same. Or use I1/I2 = A1^2/A2^2

Yeah thanks man.

 

[Suno Yaar]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w08_qp_1.pdf question 10 plzzz quick QUESTION TEN QUICK