A vertical pipe of 40mm diameter carrying a flow of a Crude oil of μ = 1.7 poise and relative density 0.82. The pressure gauges fixed in point A and point B which is above A, the distance between A and B is 50 m. Pressure gage of point A reads 650 kN/m2 and Pressure gage of point B reads 300 kN/m2. Find the direction and rate of flow through the pipe? ​

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength