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2 answers:
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Answer:
Yes the statement is true.
Explanation:
Power is defined as the rate at which energy is transferred by an object on account of work done.
Mathematically
An object that does work loses it's energy while an object on which work is done gains energy.
Power is often dependent on the type of energy transfer thus we have Electrical Power, Mechanical Power depending on the type of energy involved in the system.
Concept of power is important since it gives us a measure of how fast energy can be derived to given to a system.
Solution :
Given :
h = 2 cm
Diameter of the tube , d = 1 mm
Diameter of the hose, D = 6 mm
Between 1 and 2, by applying Bernoulli's principle, we get
As point 1 is just below the free surface of liquid, so
Therefore, 111.325 kPa is the gas supply pressure required to keep the water from leaking back into the tube.
Velocity at point 2,
= 1.617 m/s
Flow of water,
Minimum air flow rate,
= 0.0449 m/s
b). Reynolds number in hose,
υ for water at 25 degree Celsius is
υ for air at 25 degree Celsius is
= 17.25
Therefore the flow is laminar.
Reynolds number in the pipe
= 1816.85, which is less than 2000.
So the flow is laminar inside the tube.
