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1) NCERT says in some cases the angular momentum of a particle may not be parallel to the fixed axis. Can you give an example? In case of rotation about fixed axis, the component of angular momentum perpendicular to the fixed ...

2 persons are holding a rope of negligible weight tightly at its ends,so that it is horizontal. A 20kg weight is attached to the rope at the mid-point,which is now no longer horizontal. The minimum tension required to strengt ...

What are the forces acting on the ladder in the example below *Image* The ladder is held against the wall, the wall is friction-less. So what will be the fores acting on the ladder? please help...........!! ...

*Image* Capacitor A is of 4 microfarad and B is of 2 microfarad. B is charged to 12 V and then connected to A. Find the heat transfer from one capacitor to another. ...

We solve many circuits where many DC sources (eg cells) are connected in series/parallel. Have you ever wondered where you could do the same with AC Sources as well? Check out! It's really interesting. ...

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Show that the perpendiculars from the centre upon all chords, which join the ends of perpendicular diameters, are of constant length in an ellipse. ...

Find the coefficient of x^{\frac{n(n+1)}{2}-7} in the expansion of (x-1)(x^2-2)(x^3-3) \; \cdots \;(x^n-n) \quad; n\ge8. Help Please! ...

The vibation frequency of atoms in solid at normal temperature are of the order 1013/sec. Imagine the atoms to be connected by springs... Suppose that a single silver atom vibrates with this frequecy and that all other atoms ...

There is a rectangle with m vertical lines and n horizontal lines (taking the edges too). Find the no.of ways in which a pencil can travel from the North-West to the South-East corner going through the shortest possible dista ...

Guys i can't understand/agree this statement.... pls help me...... Relative to an observer at rest in a medium the speed of a mechanical wave in that medium(v) depends only on elastic and other properties (such as mass densit ...

Sn = x + x2 +x4 + ..... +x2n i remeber man111 posting a question some time ago related to this i think when |x|<1 and n→∞ , this sum should be converging which is why i am interested to find the result. plz try this pr ...

The molal lowering of vapour pressure of a liquid is 1.008 mm Hg at 25oC in a very dilute solution containing non volatile solute.The vapour pressure of the liquid at 25oC is 'A'x10 mm Hg.The value of 'A' is...... [ Integer t ...

In how many ways can a dice be coloured with 6 different colours? Means all the 6 faces should have 6 different colours. there are no other conditions.. ...

*Image* *Image* *Image* *Image* my answers are not matching . plz help me out. ...

a gas is contained in a metallic container fited with a piston. the piston is suddenly moved in to compress the gas and is maintained at this positon. as time passes the pressure of the gas in the cylinder : 1) increases 2) d ...

Not my Doubt, Just a share : Normals are drawn from Point P with slopes mi (i=1,2,3) to the parabola y2 = 4x. If the locus of P with m1 . m2 = α is a part of parabola itself, then α C1 + α3 C3 + α5 C 5 + ..... equals? ...

Q: CsCl has BCC structure in which Cs atoms occupy Body Center and Cl the corner sites. If density is 3.99 g/cc , Calculate : a) The length of edge of Unit Cell b) The distance b/w Cs+ and Cl- ions Answers not matching ...

At 298K, the thermal expansion coefficient and the Isothermal compressibility of liquid water are \beta =2\times 10^{-4} \;\;\text{K}^{-1} and \kappa =4\times 10^{-6} \;\;\text{bar} respectively. Then, \left(\frac{\partial \t ...

Q: If z3+(3+2i)z+(ai-1) = 0 has a real root, then ' a ' lies in the interval (a ε R) : My Ans: (-1,0) , Given answer (-2,3) ...

Q: Why is easier to break a piece of paper that you wet dry? ...

\hspace{-16}$Find Minimum value of $\mathbf{xy}\;,$ Given that\\\\ \begin{Bmatrix} \bold{x^2+y^2+z^2=7} \\\\ \bold{xy+yz+zx=4} \end{Bmatrix}\\\\\\ Where $\mathbf{x,y,z\in\mathbb{R}}$ ...

\dpi{120} \hspace{-16}$If $\mathbf{I_{1}=\int_{0}^{\infty}(1+x^2)^{-2012}dx}$ and $\mathbf{I_{2}=\int_{0}^{\infty}(1+x^2)^{-2011}dx}$\\\\\\ Then find value of $\mathbf{\frac{I_{1}}{I_{2}}=}$ Ans=(4021)/(4022) ...

\hspace{-16}\mathbf{\int_{\frac{1}{2}}^{2}\frac{\tan^{-1}(x)}{x^2-x+1}dx} ...

4 metal rods formed a square ABCD. The coeff. Of linear thermal expansion of AB & CD is α and for BC & DA is β.Prove that after increase in temp upto t˚ C, change between the angle of diagonals is { 1/2 (α-β)t}. ...

If (z+1)^7+z^7=0 , then find \sum_{k=0}^{k=6} \text{Re}(z_k) , where zk are roots of the the given equation. ...

*Image* *Image* *Image* *Image* *Image* *Image* *Image* please provide solutions. ...

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Let P be any point on the parabola *Image* between its vertex and the positive end of the latus rectum. M is the foot of perpendicular from the focus S on the tangent at P. Then find the maximum value of AREA of *Image* ? ...

*Image* Ans : A,C plz help me out with this problem. ...