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Mechanical Properties of Fluids
Question
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It is easy to break the wire by bending repeatedly in opposite direction instead of breaking it by stretching directly. Why?

Answer

It is easy to break the wire by bending repeatedly in opposite directioninstead of breaking it by stretching directly because by applying alternate force on the wire, the wire loses its strength and hence it is easy to break.

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Some More Questions From Mechanical Properties of Fluids Chapter

What is elasticity?

Name the property of material that opposes the deformation in it.

 Name the quantity which has neither unit nor dimensions.

Why strain is dimensionless?

What is stress?

Name the two types of stress. 

What is tensile stress?

What is compression stress?

Define tangential stress.

What type of stress is set up in the body when the deforming force produces longitudinal strain or volumetric strain?