4x4 In a vertical pipe conveying oil of s= 0.7, two pressure gauges have been installed at A and B where the diameters are 18 cm and 6 cm, respectively. A is 3 meters above B. The pressure gauge readings have shown that the pressure at B is greater than at A by 1.2N/cm2. Neglecting all losses, calculate the flow rate. If the gauges at A and B are replaced by tubes filled with the same liquid and connected to a U-tube containing mercury, calculate the difference of level of mercury in the two limbs of the U-tube.

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Fluid Dynamics

The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a vehicle. It can also be used in ship design to increase the speed at which ships pass through water.