Recently Active Questions

-2∫3 x x2-1 dx ?? ...

Parameters of monoclinic unit cell satisfies that of orthorhombic primitive unit cell's.....does it mean.......that orthorhombic..is a type of monoclinic primitive unit cell...???? ...

The molar volume of liquid benzene(density=0.887 g / ml) increases by a factor of 2750 as it vaporizes at 20 degree C and that of liquid toulune (density = 0.867 g/ml) increases by a factor of 7720 at 20 degreeC. A solution o ...

*Image* ...

NOW for H3PO4 Ka1=10-4 Ka2=10-7 Ka3=10-10 Find the pH of: 1)mixture of NaH2PO4 (0.1M + Na3PO4(0.1M) 2)H3PO4(0.1M) +NaOH in 1L solution each ...

in a stationary wave on a string,is the elastic potential energy max at the nodes?(thats what i thought till now until i saw fiitjee's solutions to a paper) ...

*Image* ...

if f(X) = x + 0∫(1xy2+x2y)f(y)dy f(x) has minima at a)x=9/8 b)x=-9/8 c)x=0 d)x=1 ...

if g(x)=1/4 ( f(2x2 - 1)+1/2 f(1-x2 ) ) and f|(x) is an increasing function then g(x) increases on (subjective type) ...

for H3PO4 Ka1=10 to the pow.(-4)..Ka2=10^(-7),Ka3=10^(-10) ...

Normals are drawn from the pt P with slopes m_1,m_2,m_3 to the parabola y^2=4x .If Locus of P is a part of the parabola with m_1m_2 = \alpha , find \alpha ...

a block of mass m moving on a circular path of radius R with constant tangettial acceleration at,the surface is rough(coefficient of friction is μ). Find the speed of the block at which it will leave the circular path a)√Π...

1) ∫xtanx dx ...

An aldehyde A(C11H8O2), which undergoes self aldol condensation gives benzaldehyde and two moles of B on ozonolysis. Compound B, on oxidation with silver ion gives oxalic acid. Identify the compounds A and B ...

A student performs an experiment for determination of g= \frac{4\pi^2l}{T^2} , l≈1 m, he commits an error of Δl. For T he takes the time of n oscillations with a astop watch of least count ΔT and hes a human error of 0.1 ...

The real numbers x1,x2,x3 satisfying the equation x3-x2+bx+c=0 are in AP find the interval in which b and c lie! ...

\int_{1}^{\infty}{\frac{x^3+3}{x^6(x^2+1)}} = ? ...

force Fvector=yi +xj acts upon a particle of mass m here how we can check that whether origin is unstable or stable equilibrium ...

draw graph for y=[x]+ x-[x] ...

S1, S2, S3.... Sn are sums of infinite Geometric series whose first terms are 1,2,3,....n and common ratios are 1/2, 1/3... 1/n+1 respectively then S12+S22+S3.... +Sn2=? ...

If thotal number of runds scored in n matches is \left(\frac{n+1}{4} \right)\left(2^{n+1} -n-2\right) where n >1, and the runs scored in the kth match are given by k.2n+1-k, 1≤k≤n. Find n ...

An element A belongs to 14th group and occupies period no 6. A reacts with conc.HCl to give B an acid. A is used to prepare C which is used as an antiknock in automobiles . Identify element A and compound B &C....... MENTION ...

Sun of the first n terms of a the series 12+2.22+32+2.42+52+2.62.... is n(n+1)2/2 when n is even what is the sum when n is odd? ...

If a, b, c, are in AP. a2, b2, c2 are in HP prove that either a=b=c or a,b,-c/2 are in GP ...

An infinite GP has first term x and sum 5 then x belongs to ? ...

a, b, c, are +ve real numbers prove (1+a)7(1+b)7(1+b)7>77a4b4c4 ...

Dear aspirants, The First Part-Test starts today & will continue till 9th December. You can take this test anytime during this period. The Link for taking this test will be put up on your homepage very shortly, keep looking a ...

let f :R-->R be any function . define g :R-->R by g(x) = |f(x)| for all x. then g is a. onto if f is onto b. one=one if f is one-one c.continuous if f is continuous d. differentiable if f is defferentiable any example o ...

two persons ach make a thrw wid a pair of cubical die n let p denote d prob dat their thrws r equal then find d value of 648p Given by Integrations! ...

a particle is observed from an inertial frame of reference and it is found to move on circular path of radius r with a uniform speed v The centrifugal force on the particle is ?? a ball of mass M strikes another ball of mass ...