Recently Active Questions

A fully charged capacitor has a capacitance C.It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity s and mass m. If the temperature of the block is raised ...

prove that if the lines of force shaped like the arcs of concentric circles with their common centre at the point O in a certain section of a field,,then the electric field in that section should be proportional to the distan ...

*Image* initially the spring was highly compressed such that b1 almost touched b2.suddenly the compressing force was removed.find m such that b2 jumps from the ground.(assume spring constant to be k) ...

*Image* when the boxes are lifted though a distance x,find the normal force between them and their acceleration ...

why cl has more electron affinity than than fluorine???????????? ...

a slender rod CD of length (l) and mass (m) is placed upright on a motionless horizontal surface . a second identical rod AB is moving along the surface with a velocity (vt) when its end B strikes squarely the end C of the ro ...

Q1. In an octahedral structure, the pair of d-orbitals involved in d2sp3 hybridisation is (a) dx2-y2,dz2 (b) dxz,dx2-y2 (c) dz2,dxz (d)dxy,dyz Q2. The d-orbital involved in sp3d hybridisation is (a) dx2-y2 (b) dxy (c) dz2 (d) ...

*Image* =? Edit:- denom is 1+sin2√θ ...

On my calculator screen, the number 2659 can be read upside down as 6952.The digitsthat can be read upside down are 0,1,2,5,6,8,9 and are read as 0.1.2.5.9.8.6 respectively.Starting with 1, the fifth number that can be read u ...

In a \Delta ABC , let x=\tan\left(\frac{B-C}{2}\right)\tan\left(\frac{A}{2}\right) y =\tan\left(\frac{C-A}{2}\right)\tan\left(\frac{B}{2}\right) z =\tan\left(\frac{A-B}{2}\right)\tan\left(\frac{C}{2}\right) Prove that x+y+z+x ...

Solve for natural 'k', x2+y2+z2=kxyz, x,y,z are naturals. ...

Consider this situation: A fixed pulley carries a weightless thread with masses m1 and m2 at its ends. There is friction between the thread and the pulley. How can there be friction when the thread is weightless?? where will ...

x=∩/2 is a point of ?????? whether local max. por local minimum considering n odd or even ...

lim x-infinity 1/n(tanpi/4n +tan2pi/4n+..........tan npi/4n) equals... is it '2pilog2'? ...

For a parallel chain reaction A→ B A→ C A→ D The rate of formation of B is 40% of rate of decay of A and the rate of formation of C is 50% rate of decay of A, then what will b the partial halp life of A, while it is con ...

how magnetic and electric field can affect the rate of reaction ...

Q1.Prove that the orthocentre of the triangle formed by any three tangents to the parabola lie on the directrix. Q2.If a normal to a parabola makes an angle θ with the axis ,show that it will cut the curve again at an angle ...

g(x) = ∫ cos4t dt , then g(x+π ) = ? { lower limit =0 upper limit= x} a. g(x) + g(π) b. g(x) - g(π) c.g(x) *g(π) d. g(x)/g(π) ...

lim x→0 sinxn/(sinx)m= ?? where m<n ...

k is a positive integer and | x | < 1 What is \lim_{n \to \infty} xn nk = ? answer supposd to be 0 ...

the value of \int_{-5}^{10}{f(x)dx} if f(x)=e^{2secx}ln(1+sinx/1-sinx) if -5\leq x\leq 5 5≤x≤5 f(x)=1 otherwise ...

let f: R→R f(x)= x x is irrational 1-x x is rational ...

prove that if 2n - 1 is prime then n is also prime ...

Please post the complete solutions of the following numericals. I have tried to solve them many ..but unsuccessfully. 1) Two equal +ve point charges are separated by a distance 2a. A point test charge is located in a plane wh ...

This functional equation is nice and has a super short and elegant solution: Find all functions f: N --> N such that xf(y) + yf(x) = (x + y)f(x2 + y2) for all x, y and in N, where N = {0, 1, 2, 3, ...}. ...

if f(x)= sin-1([x]+x)/[x] ,[x]≠0 = 0 ,[x]=0 then find lim f(x) x→0 ...

A deuteron and an α-particle are placed in an electric field. If F1 and F2 be the forces acting on them and a1 and a2 be their acclerations respectively,then A. a1=a2. B. a1 ≠a2. C. F1=F2 D. F1≠F2 What exactly is a deute ...

Find the equivalent capacitance between A and B..each capacitance is c..Options-- a. C. b. 2C c. C/2 d. none of these. I got C but its wrong according to soln. *Image* ...

There are 2 concentric metal shells of radii r1 and r2(>r1). If the outer shell has a charge q and the inner shell is grounded,,the charge on the inner shell is - _____ ? Pls explain y charge is not 0 ?? ...

b,a,c are three positive numbers in G.P. and a+b+c=abc, then least value of a^4+a^2+7 is equal to (where a^4 is a to the power 4 and a^2 is a to the power 2) ...