sign up I login
 advanced
refer a friend - earn nickels!!
priyesh   priyesh is offline priyesh's messages in the community
Message
Catalogs Discussion Forums -> Physical Chemistry -> Atomic structure-Ineresting one!!!! -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
10 replies   

lamda = h/mv




 


since v is same




 


lambda is inversely proportional to mass so




 


lambda(electron) / (lambda(proton) =  mass(proton) / mass(electron)  = 1833

Catalogs Discussion Forums -> Algebra -> The number of wqays -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
3 replies   

no. of ways of dividing n identical things to r different people(say)


then divisions will vary only with the quantity given to the persons (since things are identical)


so let x1 , x2 ,x3, .......... xR be the quantity given to person 1 person 2,person 3...... & so on till person r resp.


so we have to find the no. of non negative integral solns of  x1 + x2 + x3 + ....... + xR = n


which is coeff . of x^n in (1+x+x^2....... + x^n)^r


= coeff. of x^n in[ (1-x^(n+1))/(1-x)]^r


= coeff .of x^n in (1-x)^-r       


coeff of x^n in (1 + rC1x +  r+1C2x^2  +........... + n+r-1Cnx^n )


= n+r-1Cn = n+r-1Cr-1 

Catalogs Discussion Forums -> Mechanics -> Kinematics -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
6 replies   

a) work done = change in kinetic enrgy


work done from x = 1m to x =0.5m     =  integral -k/2x^2dx (x from 1 to .5)


= [k/2 * 1/x] = k/2


=>k/2 = 1/2mv^2  => v^2 = k/m =.01/.01 = 1


since intitially particle is at rest & acceleration is towards left hence final velocity is also left hence v = - 1m/sec

Catalogs Discussion Forums -> Electricity -> easy..elec.. -> Go to message
This Post 7 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]
3 replies   

V=6x-8xy^2-8y+6yz-4z^2-4x^2.


E =  - (partial diff of V with x   + partial diff of V with y + partial diff of V with z)


  =    - ( (6 - 8y^2 - 8x) + (-16xy - 8 + 6z) + ( 6y-8z))


now since particle is at origin hence x,y,z =(0,0,0)


E = -(6-8) = -(-2) = 2  


so force acting =qE = 2*2 = 4N


 

Catalogs Discussion Forums -> Mechanics -> i am pushing a stone of 50 tons but stone is not moving,then where is my energy go -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
9 replies   

*edited*

Catalogs Discussion Forums -> Algebra -> i^i=? & 1^i =? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
4 replies   

1)   

 


= e^(i^2* pi/2) = e ^ (-pi/2) = a purely real no.

 


2  )  1^i = (e^i*0)^i = e^(I^2*0) = e^0 = 1

 


 

Catalogs Discussion Forums -> Algebra -> Solve this: 1^i = ? and e^i =? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
6 replies   

1^i = e^[(i^2)*0)]=e^-0 = 1


e^i = cos1 + isin1 

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

to reach in shortest time the vertical component of velocity should be maximum so HE SHOULD SWIM DUE NORTH

Catalogs Discussion Forums -> Lounge -> Nadal wins wimbledon 2008 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
1 replies   

VAMOS RAFA !!!!!!!


In a 4 hr 48 min epic final, the longest ever in wimbledon history,Rafael Nadal wins Wimbledon after french emulating borg who did the same 28 yrs ago.


I'm really happy , Nadal deserves this victory, he came close to winning last year and finally he has ended federer's 5 times winning streak.


VAMOS RAFA!!!!!!!!!!!!!!!!!!!


Congo!!!!!!!!!!!!!!!!

Catalogs Discussion Forums -> Lounge -> Fedex loosing -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
20 replies   

VAMOS RAFA !!!!!!!


In a 4 hr 48 min epic final, the longest ever in wimbledon history,Rafael Nadal wins Wimbledon after french emulating borg who did the same 28 yrs ago.


I'm really happy , Nadal deserves this victory, he came close to winning last year and finally he has ended federer's 5 times winning streak.


VAMOS RAFA!!!!!!!!!!!!!!!!!!!


Congo!!!!!!!!!!!!!!!!

Catalogs Discussion Forums -> Non IIT Institutes -> AIEEE Counselling , Pls Help -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
1 replies   

I wanted to know that preferences filled during off campus counselling is final or it can be changed in on campus as well


Pls reply as fast as u can

Catalogs Discussion Forums -> Non IIT Institutes -> Reasons why amity is considered so bad -> Go to message
This Post 7 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]
25 replies   

amity does not admit students on the basis of merit


it has only one aim to earn money and thats all


All in all i 100% agree with akshaytalwar.

Catalogs Discussion Forums -> Non IIT Institutes -> RPET vs AMITY -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
5 replies   
any recognized college in india is better than amity
Catalogs Discussion Forums -> Counselling Zone -> plz help me..........urgent -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
17 replies   

attending ip university counselling as u wont get nething good in aieee

Catalogs Discussion Forums -> Non IIT Institutes -> 1 iteration(BITS) out.... -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
26 replies   

my score is 265 what can i get in 2nd iteration.Should i waitlist myself, is it worth it??????????

 
 
Go to:   

Top Offers for goIITians
Correspondence Courses
Brilliant Tutorials
Narayana Institute
Aakash Institute
Classroom/Crash Courses
Narayana - Kota , Delhi , Others
Brilliant Tutorials - Class , Crash
Aakash Institute - Medical , Engg
Online Test Series
Brilliant Tutorials
Narayana Institute
Aakash Institute
Mahesh Tutorials
AMITY      Sri Chaitanya