Raindrops of mass 5*10 power-7 kg fall vertically in still air with a uniform speed of 3m/s If such drops are falling when the wind is blowing with a speed of 2m/s, what is the angle that the path of the drops make with the vertical? Determine the kinetic energy of the drops.

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?