7. water flows trough a horizontal tube of diameter 2.5 cm that is joined to a second horizontal tube of diameter 1.2 cm. the pressure difference between the tubes is 7.3 kpa. find the speed of flow in the first tube. density of water is 1000 kg/m3 .

To solve this problem it is necessary to apply the concepts related to the continuity of fluids in a pipeline and apply Bernoulli's balance on the given speeds.

Our values are given as

From the continuity equations in pipes we have to

Where,

= Cross sectional Area at each section

= Flow Velocity at each section

Then replacing we have,

From Bernoulli equation we have that the change in the pressure is

Therefore the speed of flow in the first tube is 0.9m/s

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