How many types thermal expansions are there?It should be of one type,ie.Cubical expansion.?

Question

Why is Thermal expansion of three types,ie.Linear expansion,Superficial expansion & Cubical expansion. It should be cubical all the time as when a body (of any state) is heated,its molecules gain Kinetic Energy and move in all directions. Thus, the object should increase in size by all directions.Please send me your opinions.

Answer 1

the basis of a three dimensional object is from its linear form and area form. there fore for expansion to occur the linear and area form must expand. When each of these expansions are taken into concideration then we have linear and superficial expansion.

Answer 2

when we are heating a metal sheet the expansion in area is mainly our concern eventhough there is 3 dimensional expansion for practical purpose we neglect that small increase in width. for a linear rod expansion mainly occurs in one direction

Answer 3

Expansions take the shape of the vessel that will contain it.

Answer 4

these are of 3 types linear,superficial and cubical.

Answer 5

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Answer 6

This is an Heat Transfer Topics. dQ/dt=.......
Elements of Physics and College Physics
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