In a hydrogen like atom electron makes transition from an energy level with quantum number n to another with quantum number (n - 1). If n>>1, the frequency of radiation emitted is proportional to
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If m is the A.M. of two distinct real numbers land n(l,n>1)andG1,G2 and G3 are three geometric means between land n, then G14+2G24+G34equals,
A sonometer wire of length 1.5 m is made of steel. The tension in it produces an elastic strain of 1 %. What is the fundamental frequency of steel if density and elasticity of steel are 7.7×103kg/m3and2.2×1011N/m2 respectively?
The integral ∫24logx2+log(36−12x+x2)dxlogx2 is equal to:
Two charges, each equal to q, are kept at x = ?a and x = a on the x-axis. A particle of mass m and charge q0=2q is placed at the origin. If charge q0 is given a small displacement (y a) along the y-axis, the net force acting on the particle is proportional to:
The area (in square units) bounded by the curves y=x,2y−x+3=0, x-axis, and lying in the first quadrant is
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?
Let tan−1y=tan−1x+tan−1(1−x22x), where ∣x∣<31. Then a value of y is :
The area (in sq. units) of the quadrilateral formed by the tangents at the end points of the latera recta to the ellipse 9x2+5y2=1, is: