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Catalogs Discussion Forums -> Vectors -> DIFFICULTY IS ONLY MADE 2 BE SOLVED -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
hanuman...1/0 is not infinity!!
Catalogs Discussion Forums -> Organic Chemistry -> Acidity -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
in ortho , intra molecular h bondin is dere bcoz of which h+ is not easily lost . also no2 being para to oh stabilises the -v1 charge on the phenoxide . hence the answer
Catalogs Discussion Forums -> Differential Calculus -> n.c.e.r.t problem -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
yes kab is right
Catalogs Discussion Forums -> Differential Calculus -> (Increasing fns)Least value of a -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
the answer is -2
Catalogs Discussion Forums -> Differential Calculus -> Two values for dy/dx? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
yes both the methods are right . they are however right in different domains .  
 
in the first case cosx/2 > sinx/2 , thus root( cosx/2-sinx/2)^2 = |cosx/2-sinx/2|
 
the reverse holds in d other case
Catalogs Discussion Forums -> Organic Chemistry -> orientation of benzene ring -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
the electronegitivity comes into the picture in -I effect only . the electrons in the chlorine - lone pairs - are in the same plane as the e of the benzene - so electrons are donated to the ring ( R+ effect ) .
 
( actually this is only to explain the obserced effects . resonance structures  only exist on paper in the end !)
Catalogs Discussion Forums -> Counselling Zone -> [Admin]:****** -> Go to message
This Post 7 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]
my dear frend , i would quote from my favorite book :
 
" when u r inspired by some gr8 purpose , some extraordinary project ,all ur thoughts break their bonds . ur mind transends limitations , ur consiousness expands in every direction and ufind urself in a new gr8 and wonderful world ."
 
i admit to have gone thru the same problem myself & used to feel destructed after doing so .
but d good always wins . focus on all that is gud and wonderful in ur life . dont waste ur time over such things . trust urself and ur dreams ... i am sure they r big enough to beat this problem .
 
u r d future . conquer ur desires raher than satisfying dem . u will win 4 sure.
 
with best wishes
aman
Catalogs Discussion Forums -> Counselling Zone -> last 2 months -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
hello  !!! the days are ticking by .  somebody pls guide me  !!
Catalogs Discussion Forums -> Counselling Zone -> help in chemistry -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
it is a fundamental problem but kind of tricky
 
def of pH says that it the -ve log to base 10 of H+ ion conc in mol per lit
 
now ionisation of H2SO4-------> 2H+   +    SO4^2-
 
thus by stoichiometry 1 mole of acid give 2 moles of H+
 
thus in .0001mol acid [H+] = 2* .0001
 
thus pH = 4  - log2
             =3.69
Catalogs Discussion Forums -> Organic Chemistry -> THE ORGANIC CHEMISTRY -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
practice and hardwork is the key . dont jump to the problems directly
while studying practice each and every problem IN WRITING and keep on revising your course regularly. once you are thorough with your syllabus
then only attempt the problems.
organic chem though is tedious in the beginning but literally becomes a joyride
once the student acquires a firm base . so practice hard and NEVER LOSE UR CONFIDENCE. ask 4 help whenever stuck .
 
all th best!
Catalogs Discussion Forums -> Organic Chemistry -> acidic strength -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
aakriti is absolutely right . this phenomenon is called back bonding
Catalogs Discussion Forums -> Coaching Institutes & Course Material -> I.I.T J.E.E books -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
my dear frnd i am preparing 4 iitjee-07 & have considerable experience regarding books(atleast)
dont do too many stick to the following and you will be through !
 
physics : hc verma (a must tom solidify your base)
              d mukherjee(for objectives)
 
chemistry : rc mukerjee
                 peter sykes(organic)
 
mathematics : TMH (a rocking book)
 
best of luck !!
 
 
Catalogs Discussion Forums -> Counselling Zone -> last 2 months -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
please guide me how to go about revising  and completing my syllabus along with my board preparations. also kindly suggest the course material which i should rely upon . also my speed is not very good. so pls suggest how i should go abt practising papers as i am able to find very less time for them
Catalogs Discussion Forums -> Mechanics -> archimedes principle -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
there is a cylindrical vessel of inner diameter 6cm . in it a 4cm ice cube is kept .
assuming that the cube melts uniformly so that it always retains its cubical shape , calculate the length of the cube's edge at the time it just breaks off from the bottom
Catalogs Discussion Forums -> Counselling Zone -> please help _urgent!!! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
have i been forgotten ??? pls koi toh meri madad karo !
Catalogs Discussion Forums -> Counselling Zone -> please help _urgent!!! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
this query is for PATHFINDER sir (and others too who can help me )
 
sir i am a student of class 12 enrolled in fiitjee regular classroom program for the past two years.Off late i have started to realise that i have never been able to perform to my highest level during my jee preparations.though iam in the regular classroom batch -1 (for the past two years ) and am coached by the best teachers of fiitjee , i somehow feel that i lack confidence. I have never been on the toppers list any time and neither do my teachers think that i will be able to do any big on the jee day.But considering my background - i am a NTSE scholarship holder , have also won the JSTS scholarship , an also qualified for the KVPY interview apart from my usual success at the interschool science competetions and the national science olympiad. But for the past two years this joy of studying and success (apart from KVPY ) has eluded me . I feel that i lacksomething in me -after all i am not being what i am and what i am capable of being . I think that all this superficial hype of IIT ...IIT ...IIT has kept me down-i have never been able to enjoy work. I am feeling thati am at some loss. Whenever i have looked upon my teachers they have helped me but i feel that this counselling is not what i want - i want somebody to encourage me more to know my own potential which i am beginning to think that i am slowly losing touch with  my true self.
 
and to accompany it all in the recent fiitjee aits conducted i have only scored a percentile of 85 both times and that too mainly because of chemistry with me not getting decent marks in maths and physics . as a result my morale has completely gone down  . i am trying to stay away from all this mental "illness" but it doesnt help as a rewsult of which i am not able to focus myself which has been a persistent reason for my mediocrity for the past 2 years and now when evrything seems so close i am going into some sort of a dipression of not being able to perform and this is accompanied by my parents high expectations for me which are not wrong in any way but they want results and quickly  - they have notbeen able to understand my problem and have always tried to compare me with others who are performing better than me in both school and coaching.
This has left me completely blank in my mind and i try to spendmy time mostly sleeping or talking or listening to music and am able to devote very less time usually about 5-6 hours and that too not very effective on the day of a holiday.
 
i discussed this problem with my cousin who is a iit-delhi passout but he has always said that i should study for jee hard but my problem is that studying for an exam  was never an inviting prospect for me weter it was NTSE or anything else . i just liked to work. and now time is so near that i am feeling complete lack of motivation , self-satisfaction and am in a state of utter confusion.
i try to make a plan for myself but fail every time to execute it efficiently.
 
sir , i dont want to dissapoint anybody not even myself . but with only 4 months to go and the pressure of cbse on my head i feel myself caught .
 
please sir . please help me in conquering this mental trauma and kindly advice me how to go about my work for the last few months which includes the study material to be used  and time management and still achieve that mental satisfaction which has lured me for so much time . my teachers say that i will be able to crack jee with a rank in the1000-2000 bracket which as suc is ok but is never enouh to my true potential.
 
PATHFINDER sir or anybody please help me knowing my true potential - i dont want to lose .
i will always remain grateful to you for the rest of my life.
 
thank you.
 
amangem
(aman goel)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Catalogs Discussion Forums -> Mechanics -> how is this possible -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
power=force*velocity
above is not the avg power - it is the instantaneous power.
secondly the situation you suggested is possible when the applied force is in the direction opposite to the initial velocity
Catalogs Discussion Forums -> Algebra -> permutations combinations and binomial theorem -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
i face problem in solving problems regarding series of binomial coefficients . also pemutations and combinations is a problem as many a times i am not able to think in the right direction . as a result i get demoralised and bored very quickly . please help.
 
 
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