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Mathematics: Post your doubts here!
in part i we got v= 40 + Tsin25 and x= Tcos25 we have been told that the system is in equilibrium so this means the frictional force (F) will be equal to horizontal component (x) of the tension and we know the equation F = μR R is the contact force which is the force that the rod is acting on... -
Chemistry: Post your doubts here!
ok, a mathematical way to answer this question is to look at 2 experiments in the table which has one thing different only then divide them over each other for example.. experiment 2 and 3..we will divide the rate equation of the 2 by each other. first of all the rate equation in general is r=... -
Mathematics: Post your doubts here!
hey can someone help me with question 10(i) nov/oct 04 paper 3...i need full explanation please http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w04_qp_3.pdf -
Chemistry: Post your doubts here!
ok this question is testing you if you understand, 1. addition reactions of alkenes 2. the mass spectrometry we have our molecule propene (CH3CH=CH2). when we add it to a solution of bromine and chlorine addition reaction will occur..now we need to identify what species will be formed and we... -
Chemistry: Post your doubts here!
will help you but can u post the mark scheme to this question too or tell me because i don't want to give u wrong answers at the end :/ -
Mathematics: Post your doubts here!
can someone help me with question 2, 5 and 6 of the paper october november 2011 pr 53 M2 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w11_qp_53.pdf -
Mathematics: Post your doubts here!
please need help with may june 2011 31 question 8(ii) and 8(iii) http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s11_qp_31.pdf -
Chemistry: Post your doubts here!
we don't even have may/june 2013 yet... -
Mathematics: Post your doubts here!
ok, when you have a question in that form u need to change it to the form x+ yi and to do this u multiply the denominator by the conjugate (1-i) and u multiply the nominator by the conjugate so.. 2/1+i = 2(1-i)/(1+i)(1-i) = 2-2i/(1^2 + 1^2) = 1-i the mod of |1-i| = √(1^2 + 1^2) = √2 arg... -
Mathematics: Post your doubts here!
can someone please explain question 10 (ii) in may/june 2005 mathematics paper 3 how in the mark scheme he got the vector parallel to the place. how can i find a vector parallel to a plane... -
Someone explain AS maths S1 and M1 pls :/
if you will do engineering then stick with M1 and M2 and that is if you are doing the full A level not just AS but if u r doing AS only then do AS M1 it will help u a lot with your engineering course -
Mathematics: Post your doubts here!
oh sorry i made such a stupid error i calculated y as in sin (2t) not sin^2 t so i got the answer y=1 instead of y=1/2 did u get me ? -
Mathematics: Post your doubts here!
w alikom al salam.. here is the solution to the question (i) you have to know that whenever u have a parametric equation, dy/dx = dy/dt X dt/dx dy/dt = 2sin t. cos t dy/dt = 2sintcost dx/dt = (1/tan t) x sec^2 t dx/dt = (cos t / sin t ) x 1/cos^2 t dx/dt = 1/sin t cos t dy/dx =... -
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Mathematics: Post your doubts here!
cos ( q + 60) = 2sinq cosqcos60 - sinqsin60 = 2sinq 1/2cosq - √3/2 sinq = 2sinq 1/2cosq = 2sinq + √3/2 sinq tan q = 0.1745 q = 9.9 and 189.9 check if its correct in the mark scheme or something and tell me ! -
Mathematics: Post your doubts here!
dx/dt = 1/x - x/4 make this into one fraction first: dx/dt = (4-x^2)/4x then dt/dx = 4x/(4-x^2) and dt = 4x/(4-x^2) dx so t = ∫4x/(4-x^2) dx integrate this and u will get an answer of t = -2ln(4-x^2) + C ( if u dont know how to integrate it then tell me) anyway after u have integrated this... -
Mathematics: Post your doubts here!
hello i need help with this question !! so annoying.. http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w06_qp_3.pdf question 7(ii)..how do we solve 2 equations with 3 unknowns Oo if we have these 2 equations a+2b+c = 0 and a-2b+c = 0 pleeaasee do help me ! -
Chemistry: Post your doubts here!
SO4 2- NO3 - F- Cl- OH- Br- I- everythin before OH- stays and O2 is given off and everything after OH- is given off instead of OH- -
Chemistry: Post your doubts here!
can someone explain to me question 4(c) of this paper. it is so confusing! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s07_qp_4.pdf -
Mathematics: Post your doubts here!
need help in question 8 may june 2007, the second part please http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s07_qp_3.pdf