Equation of a progressive wave is given by
The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of 
/2 ?
Two waves having the intensities in the ratio of 9 : 1 produce interference. The ratio of maximum to the minimum intensity, is equal to
The minimum number of co-planer vectors required whose sum is zero, is
The minimum number of non-coplanar vectors whose sum can be zero
For a particle (tied with massless string) to complete motion in a vertical circle of radius r, the minimum velocity required at its lowest position is
