Three sound waves of equal amplitudes have frequencies (v−1),v,(v+1). They superpose to give beats. The number of beats produced per second will be
The height at which the acceleration due to gravity becomes 9g (where g = the accleeration due to gravity on the surface of the earth) in terms of R, the radius of the earth is
Relative permittivity and permeability of a material are ϵrandμr, respectively. Which of the following values of these quantities are allowed for a diamagnetic material ?
Statement-1 : Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and
Statement-II: For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it decrease with increasing Z
A thin rod of length 'L' is lying along the x-axis with its ends at x=0andx=L. Its linear density (mass/length) varies with x as k(Lx)n, where n can be zero or any positive number. If the position xCM of the centre of mass of the rod is plotted against 'n', which of the following graph best approximates the dependence of xCM on n ?
Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl