Recently Active Questions

Q1 Prove that phase diffference between pattern and source in YDSE is π Q2 If slit plane is oscillate with SHM having eqn y=dsin(ωt), then find eqn of source??? ...

*Image* . ...

Which of these cannot be classified as a projectile motion? ...

If f(0)=f(1)= 1/2 ,|f'(1)|<1 and f'(0)=2,then \lim_{x\rightarrow 0} \frac{f(sin x)-f(cos x)}{x} is A. 0 B. 1 C. 2 D. 1/2 ...

gravtational potential is a.decreases with increase with height??? TRUE OR FALSE n field decreases with increase with height TRUE OR FALSE (SOURCE Brialliant part test 3.paper II.question 49) ...

consider a town with n people. a person spreads a rumour to a second,who in turn repeats it to a third and so on.suppose that at each stage,the recipient of the rumour is chosen at random from the remaining (n-1) people. what ...

prove that (n!)2 > nn (i know the proof but am looking for a much simpler one) ...

S1 : Bohr's theory can also be applied to Pb81+ . S2 : Bohr's theory is applicable only for H or H like species. Can Pb81+ be even formed ?? ...

The integer n for which \large \lim_{x\rightarrow 0} \frac{(cos x -1)(cos x - e^{x})}{x^{n}} is a finite non-zero number is A. 1 B. 2 C. 3 D. 4 ...

A horizontal plane with the coefficient of friction k supports two bodies : a bar and an electric motor with a battery on the block. A thread attached to the bar is wound on the shaft of the electric motor. The distance betwe ...

Let f(x) = ax^2+bx+c be such that |f(x)| \le 1 \ \forall \ x \in \[-1,1] Prove that |2ax+b| \le 4 \ \forall \ x \in [-1,1] This topic is current in mathlinks.ro, and in any case no borrowed solutions please. ...

*Image* . ...

1) The no. of points at which the function f(x) = max {a-x , a+x, b}, - ∞ < x < ∞ , 0 <a < b cannot be differentiable is: (a)2 (b) 3 (c)1 (d) 0 2) If f(x) = sin (2∩ [ ∩2 - x] )/5 +[x] 2 ; where [.] denotes ...

f(1) = 1 f(2n) = f(n) f(2n+1) = f(n)+1 where n is an integer and f is a function defined over integers... Give a simpler explanation for f... ...

*Image* Charge is spayed onto a large non conducting belt above the left-handed roller as shown in the above figure. The belt carries the charge density s , as it moves with speed v b/w the rollers as shown. The charge is rem ...

On an island there are 5 pirates {A,B,C,D,E} who are equally greedy and equally logical. They have 1000 coins and they have to distribute it among themselves. First A gives his plan for distribution. If his plan is accepted b ...

*Image* ...

prove by combinatorial arg.tht 2nCn is div by n+1 ...

can anyone derive this formula for dopplers effect v+v(o)cos@/v+v(s)sin@ ...

sirs whenver i see a new problem which ihvnt solved before i get tensed and think tha i cannot do it but eventually i solve it ... Is it normal? if not how to cure it? ...

*Image* ...

THIS IS WHAT AN OLD IITIAN HAD TO SAY.... AT A SILVER JUBILEE REUNION While we were enjoying ourselves and renewing our long-lost contacts, some of us visited the hostels and interacted with the present students. We learnt th ...

Find all real a for which there exist non-negative reals x_i for 1≤i≤5 satisfying the system.... \sum_{i=1}^{5}ix_i=a \sum_{i=1}^{5}i^3x_i=a^2 \sum_{i=1}^{5}i^5x_i=a^3 . ...

*Image* *Image* ...

for the reaction 5A+3B[eq]6C+D, Kc has the units ...

Can anyone tell me how we write q-value in case of β- and β+ decay? I have some confusion in what is written in hcverma. ...

i am a bit confused .-radioactivityas we know there is always a mass defect .then why the packing fraction is positive as well as negative..................hmmm let me see how can help ...

STRAIGHT LINES 1 ) Find the area of the triangle formed by the straight lines whose equations are x+2y-5=0; 2x+y-7=0 and x-y+1=0 withought determining the coordinates of the vertices of the triangle. Also compute the tangent ...

Q) the uniform rectangular (laminar) block in the figure has mass M and dimensions [a,a/2] which is supported by two massless inelastic strings of equal length whose other ends are attached to a rigid ceiling Find the angular ...

I dont know how many times this one has been discussed here.....but the reason for posting here is that I just found 2 good solns to this one..... Find resistance b/w A and B *Image* Lets see who posts all 3.... Start with th ...