Explanation
Poisson's ratio varies between –1 and 0.5.
In the region OA, stress α strain . i.e.Hooke's las hold good.
Area of hysterisis loop gives the energy loss in the process of stretching and understretching of rubber band and this loss will appear in the form of heating.
i.e.for the same load thickest wire will show minimum elongation so graph D present the thickest wire.
At point b yeilding of material starts.
Elasticity of wire decreases at high temperatare i.e. at higher temprature slope of graph will be less, So T1 > T2.
B'se stretching of coil simply chnages its shape without any change in the length of the wire used in coil Due to which shear of elasticity is prevolved.
Ivory is more elastic than wet-clay. Hence, the ball of ivory will rise to a greater height. Infact the ball of wet day will not rise at all it will be same, what flattended permanently.
Soap helps to lower the surface tension of solution thus soap get stick to the dist partcles and grease and these are removed by action of water.
We know that the intermolecular distance between the gas moleculas is Large as compaired to that of liquid Due to it the forces of cohesion in the gas moleculas are very small and these are quite Large for liquids. Therefor the concept of surface tension is applicable to Liquid but not to gasses.
The height of capillary rise is inversly propostional to radius (or diameter) of capillary tube
i.e. h ∝ 1/r so, for smaller r the value of his higher.
= 760 – 750 = mnat Hg = 4ρg.
Weight of the ball = Buyoant force + viscous force.
Aschemedies principal explains buoyant force and bouant force depends on acceleration due to gravity.
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