A horizontal pipe of diameter 0.775 m has a smooth constriction to a section of diameter 0.465 m . The density of oil flowing in the pipe is 821 kg/m3 . If the pressure in the pipe is 8520 N/m2 and in the constricted section is 6390 N/m 2 , what is the rate at which oil is flowing

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?