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saharsha kumar keshkar   saharsha kumar keshkar is offline saharsha kumar keshkar's messages in the community
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Catalogs Discussion Forums -> Course Material -> i have 9 rates. but in my profile it is written as -NEW kid on block.HOW it changes. -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]
i have 9 rates. but in my profile it is written as -NEW kid on block.HOW it changes.
Catalogs Discussion Forums -> Trignometry -> I want information for trigonometry -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

what information.

send quickly.
Catalogs Discussion Forums -> Electricity -> how does stationary waves form in open tube with out any medium change -> Go to message
This Post 10 points    (2 Olaaa!! Perrrfect answer.   in 2 votes )   [?]

when longitudnal waves propagate in a fluid in a pipe with finite length, the waves are reflected from the ends in a same way the transverse waves on a string are reflected at its ends.The superimposition of the travelling waves in opposite directions forms a langitudnal standing waves.

WAIT FOR A WHILE I M FURTHER EXPLAINING.

RATE .
Catalogs Discussion Forums -> Organic Chemistry -> what is Chichibabin reaction?Plz explain -> Go to message
This Post 5 points    (1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]

 Chichibabin reaction is a method for producing 2-aminopyridine derivatives by the reaction of pyridine with sodium amide. Chichibabin reaction is a nucleophilic substitution on the pyridine ring;

i have explained below.

 

 

 

 

 
for more and detail see morison and byod.

 

Image:Tschitschibabin.png

rate me!
Catalogs Discussion Forums -> Coaching Institutes & Course Material -> I'm in Class 10 & I'm going to giv bords in 09.I wnt 2 join an JEE coaching insti.plz help -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Hey guy.

it is not the tution which helps u to get IIT.

self study is the best study.

any way i think NARAYANA is the best because it is really good.

I joined the narayana test series and it is helping me.

rate & nudge me.
Catalogs Discussion Forums -> Physical Chemistry -> how to learn perodic table..................? -> Go to message
This Post 5 points    (1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]

 

He Lina Ki Rab Se Fariyad.[group 1]....H LI k Rb Cs Fr

Beta Mange Kanya Sunder Baap Roye.[group 2].....Be Mg K Sr Ba Ra

Baigan Aalu Gobhi In Thila(bag).[13]....... B Al Ga In Ti

Cahe(kahe) Sita Ge Sun Prabhu.[14]........C Si Ge Sn Pb

Newzealand Pakistan  Australlia Sab Bikey.(match fixing)[15]..N P As Sb Bi 

O Salma Sarke Tera Pallu.[16]....O S Se Te Po

Fir Cal Bahar I Aunty.[17]...F Cl Br I At

RATE ME AND WAIT FOR D BLOCK SHORTCUTS.
Catalogs Discussion Forums -> Physical Chemistry -> how to learn perodic table..................? -> Go to message
This Post 27 points    (5 Olaaa!! Perrrfect answer.   in 6 votes )   [?]

He Lina Ki Rab Se Fariyad.[group 1]

Beta Mange Kanya Sunder Baap Roye.[group 2]

Baigan Aalu Gobhi In Thila(bag).[13]

Cahe(kahe) Sita Ge Sun Prabhu.[14]

Newzealand Pakistan  Australlia Sab Bikey.(match fixing)[15]

O Salma Sarke Tera Pallu.[16]

Fir Cal Bahar I Aunty.[17]

RATE ME AND WAIT FOR D BLOCK SHORTCUTS.
Catalogs Discussion Forums -> Optics -> optics -> Go to message
This Post 5 points    (1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]

w(fringe width)=KD/d; where  K=wavelength of  source.

w is proportional to K.

if YDSE immersed in liquid of refractive index u.

now see;

1u2=[u2/u1]=[K1/K2]

u2=u

u1=1

hence we can say that K decreases hence w decreases.(fringe width decrease u times )

I m waiting for your rates.

 
Catalogs Discussion Forums -> Mechanics -> if a particle is accelerating , it is either speeding up or speeding down . do u agree ?? -> Go to message
This Post 5 points    (1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]

no!

acceleration can change directions.

 
Catalogs Discussion Forums -> Electricity -> TRICKY ONE--HCV--CAPACITORS--Q.57,Q68 -> Go to message
This Post 10 points    (2 Olaaa!! Perrrfect answer.   in 2 votes )   [?]

Take a differential element of length dx at a distance x from either end.

dC1=(K1e0ldx)/(d-xtano)

dc2=(K2e0ldx)/(xtano)

these two capacitors are connected in series.

1/dC=(1/e0l)*[((d-xtano)/K1)+((xtano)/K2)]*(1/dx)

take tano=d/l

now

integration of dc=[(K1K2e0l2)/d] integration of [(dx)/(K2l + (K1 -K2)x)]l0

C=[(K1K2e0l2)/(K2-K1)d]*ln(K2/K1)

rate me!!!!!!!!(if any doubt nudge me now.)

********************************************************************

HINT to my solutions.

take vertical gap be d,    and a elemental part be dx at a distance x.

 

o=theta(angle)

e0=epsilon

Catalogs Discussion Forums -> Organic Chemistry -> solve this -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

it is question which needs little bit thinking.

now follow me what i m explaining.

 

Products.... "D"=> CH3-CH(=O)  ,   "D"=>  CH3-CH(=O)  , "E"=> CH(=O)-CH(=O) .....2 get back A we have to remove the =O &join with double bonds.... The structure is...   "A" =>  CH3-CH=CH-CH=CH-CH3 (note the positions of red carbons..)

 

So on reduction first one double bond will break & the the other giving u foll. structures..

"B" =>CH3-CH(H)-CH(H)-CH=CH-CH3   &  "C"=>CH3-CH(H)-CH(H)-CH(H)-CH(H)-CH3 (blue H are added ones)

 

Last part on oxidation of "B" double bond breaks & Changed to -COOH group....so u get ...

"F" => CH3-CH(H)-CH(H)-C(=O)(OH) along with   CH3-C(=O)(OH).

its a good question.

now rate me!!!!!!!!!!!!!
Catalogs Discussion Forums -> Mechanics -> Please explain in detail the answer -> Go to message
This Post 5 points    (1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]

Is the ans is 66m. 


u r too confused man.Iagine what i m writing.


u know that human ear can differentiate(hear) sound which has atleast 1/10 sec.


therefore, 330 * (0.1)=33m.


now  take sound as particle.


if throw a particle(sound) at a distanse of 33m in 0.1 sec.


to avoid collison it should be back to u when u throw.(that is to avoid interference of sound as u said the person heard echo.)


therefore, it should at a distance of 33+33=66m.


IS THE ANSWER IS(C).


NOW RATE ME!
Catalogs Discussion Forums -> Law Entrance -> where do we get CLAT forms? -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

www.clat.ac.in


or try


www.clat.ed.in


if wrong nudge me!


cost-2500Rs.
Catalogs Discussion Forums -> Integral Calculus -> pls solve this............ -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

yes it is (B).



i have solved it by integrating by parts by taking x as 1st function.


remember the rule for taking 1st function.


ILATE-Inverse


          Log


         Algebric


           Trigo.


               Exponential.


 


 


 if u resolved answer RATE ME.
Catalogs Discussion Forums -> Algebra -> a good question -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

kindly send solution also.


RATES ASSURED!


The no. of right angled triangles with integer sides and inradius 2009 is?


(a)10


(b)12


(c)15


(d)18


 
Catalogs Discussion Forums -> Algebra -> probability -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]


solution PLEASE!!!!


rates assured!



A fair dice is thrown six times and the list of numbers showing up is noted.The probability that among the numbers 1 to 6 only 4 numbers appear in the list is?


(a)64 / 729


(b)165 / 729


(c)165 / 1944


(d)325 / 648
Catalogs Discussion Forums -> Algebra -> probability -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]



 



 




 






 








 










 












 














 
















 


















 




















 






















 













A fair dice is thrown six times and the list of numbers showing up is noted.The probability that among the numbers 1 to 6 only 4 numbers appear in the list is?


(a)64 / 729


(b)165 / 729


(c)165 / 1944


(d)325 / 648


KINDLY GIVE SOLUTION!!!!!!!!!!!



 
Catalogs Discussion Forums -> Algebra -> ncert - probability - miscellaneous - Q.11 -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]

kindly give the question. i wiilsolve it at the earliest.
Catalogs Discussion Forums -> Algebra -> probability -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]


KINDLY GIVE ME SOLUTION OR APPROACH>



A fair dice is thrown six times and the list of numbers showing up is noted.The probability that among the numbers 1 to 6 only 4 numbers appear in the list is?


(a)64 / 729


(b)165 / 729


(c)165 / 1944


(d)325 / 648
Catalogs Discussion Forums -> Vectors -> a good question of VECTOR -> Go to message
This Post 0 points    (0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]


KINDLY GIVE ME SOLUTION !!!!!!!!!!!!!!!!!



If the resultant R of two forces P and Q of magnitude 5 units and 4 units, trisects the angle between them, then |R| =


(a)3 / 2 units


(b)2 units


(c)7 / 3 units


(d)9 / 4 units
 
 
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