Hydraulics and Fluid Mechanics in ME
When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

Principle of flotation
Archimedes’s principle
Bernoulli’s theorem
Pascal’s law

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Hydraulics and Fluid Mechanics in ME
Surface tension

Acts in the plane of the interface normal to any line in the surface
Decreases with fall in temperature
Is a function of the curvature of the interface
Is also known as capillarity

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Hydraulics and Fluid Mechanics in ME
The hammer blow in pipes occurs when

There is excessive leakage in the pipe
The flow of fluid through the pipe is suddenly brought to rest by closing of the valve
The flow of fluid through the pipe is gradually brought to rest by closing of the valve
The pipe bursts under high pressure of fluid

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