debmalya choudhuri   debmalya choudhuri is offline debmalya choudhuri's messages in the community
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Catalogs Discussion Forums -> About IITs and JEE -> Tell Us Abou Your IIT-JEE 2010 Exam! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
the complete analysia::)-maths was tough and lengthy as madras set it was ceratin would be lyk tat chemstry easier side more scoring physcs then the second paper had some calculations i the passages jst tat dnt thnk will not get avery good rank still got a chance nxt year hopng for the best cheers
Catalogs Discussion Forums -> Algebra -> What will be the last two digits in : 1! + 2! + 3! + 4! + ............... + 100! -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
simple one venkateshan tens digit is 9 and units os 3 all u have to see is this 1!+2!+3!+4!+5! ends in 3 units after at all have 0 at units place similarly to find tens digit find till 9! ull get the answer
Catalogs Discussion Forums -> Coaching Institutes & Course Material -> bmat fst 5 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
MATHS ONE U R RIT WRONG SOLUTION I HAD MATCHED my answers also with my frnds i know tat one is rit not theirs neways wats ur score??
Catalogs Discussion Forums -> Coaching Institutes & Course Material -> Which one is a better institute for preparation of IIT? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
undoubtedly bansal classes ,kota
Catalogs Discussion Forums -> Differential Calculus -> find the no of solutions of 2^cosx=|sinx| in the interval(-2pie,+2pie) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
this one's from graph only u draw a rough sketych ull see six solutions see mod sinx is easy now 2^cosx is periodic with period 2 pi and also it is even o just draw from 0 to 2pi and double the cutting points. cheers !!
Catalogs Discussion Forums -> Algebra -> the digit at the units place of 2137^754? (2137 power 754) -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
its 9 this ones easy more becoz the last digit is 7 u can do it plainly see we know tat 7^4ends in 1 so just find 754 modulo 4 =2 so 7^2=49 last digit 9 is the required answer
Catalogs Discussion Forums -> Coaching Institutes & Course Material -> is Brilliant AITS IIT 2010 Getting very tough? .like that of fiitjee?? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
yaa even i agree i get around 190-200 they show 98-99 ths time test 4 was bad maths paper 1 mine just gettng 12-13 they r tougher than fiitjee aits
Catalogs Discussion Forums -> Counselling Zone -> wht shud b the optimum percentile in brilliant tests specify for part tests n full tests -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
yaa even i would like to know this im enrolled in it tats why ill have a better view of the performance according to me i think 95 percentile above or wat ???my sr told so
Catalogs Discussion Forums -> Magnetism -> A conducting rod of length l moves with velocity v a direction parallel to a long wire carrying a st -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
see here it is the case of induced electricmotive force now u have to calculate the average magnetic field wich is given as integral of b.dr/inetgral dr 'ull have a log r trem ie mostly log(1+r/l) as ur varying the distnace from r to r+l and the rest is e=bvl tats it similar problems in verma given chhers
Catalogs Discussion Forums -> Algebra -> if arg(z) < 0 then arg(-z) - arg(z) = ?? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
thher are several ways of doing this u can eiter do by argand diagram or just by the fact tat arg(-z)-arg(z)=arg(z1/z2)=arg(-1)=pi which again can be proven in the argand plane chhers
Catalogs Discussion Forums -> Organic Chemistry -> [organometallic componds] : isopropyl bromide on reaction with Mg / Ether followed by treatment with -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
here first u get the grignards reagent which is subjected to attack by acid here water (grignard reagents are strong bases )what follows is simple acid base reaction here its better to consider this only so ull get alkane with the incorporation of D and oh- strong base +strong acid gving weak acid +weak base so equilibrium lies to the right cheers
Catalogs Discussion Forums -> Electricity -> A capacitor is connected to a battery. a dielectric is then inserted. (battery is not removed ).What -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
arrey yaar see here the volatge acroos the capacotior is remaining constant so electric field is remaining constant but u might expect it to reduce actually this effect is cancelled by the charge tat the battery delivers to the plates(adiitional) so charge increases k times and capcitance too increases for better understanding refer resnick halliday krane cheers
Catalogs Discussion Forums -> Mechanics -> electricity -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
is it 2 brv the first one ??and the second i also have a doubt .the first one will come on integartion a big result but effectively i think u take the rod of effective length 2r i saw it somewhere in verma something of this sort is only given
Catalogs Discussion Forums -> Vectors -> find the angle between the vector s find the angle between the vector s 2i-j+k, i-3j-5k -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
man this one was easy actually see whenevr u r asked to find the angle all u do need to take is the dot product only the geometrical meaning is the projection of one line on the other ttats why u get the angle
Catalogs Discussion Forums -> Integral Calculus -> Integrate -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
i think it will be simpler if i use by parts in the first step i mean consider the function to be u=ln(1+x^2) and dv=dx then use parts like i=uv-integral(vdu)this is the way given in maron for parts its faster and u dont have to remmebr tat large stuff .then ull get one term which u have to reduce using partial fractions tats it cheers
Catalogs Discussion Forums -> Mechanics -> question of thermal physics -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

1.three liquids  of equal mass are at temperatures  12,19 and 28 degrees celsius respectively.when  a bd b are mixed the final temperature is 16 when b and c are mixed final temp is 23 find final temperature when a nd c are mixed plzz solve with proper steps

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Catalogs Discussion Forums -> Algebra -> For experts.( math wale) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
great way of solving i mean though this is the shortest way i was not able to maximise the stuff probably calculation error good job
Catalogs Discussion Forums -> Algebra -> For experts.( math wale) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
great way of solving i mean though this is the shortest way i was not able to maximise the stuff probably calculation error good job
Catalogs Discussion Forums -> Organic Chemistry -> hey can anybody give me a proper reason as to why carbonions dont undergo rearrangment???and if -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
poeple its carboanions carbocations is easy see in carbanions generally except phenyl groups ,there is accomodation of two electrons in the anti bomdiing molecular orbital of much higher energy so not possible .see ive told u very brief stuff please refer peter skyes if possible ull find it there cheers
Catalogs Discussion Forums -> Electricity -> 1conceptual stuuf from electrostatics -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
good job both of u this proves some guys are not sleepin after all i was just expecting an aswer thanx a lot cheers will return soon with more better thought provoking stuff as this one i guess was doable
 
 
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