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According to Stokes law, the relation between terminal velocity vt and viscosity of the medium (η) is,

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Important Questions on Properties of Matter

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The diagram shown below represents the applied forces per unit area with the corresponding change X (per unit length) produced in a thin wire of uniform cross-section in the curve shown. The region in which the wire behaves like a liquid is

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The diagram below shows the change in the length X of a thin uniform wire caused by the application of stress F at two different temperatures T1 and T2. The variation shown suggests that

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A ball is falling in a lake of depth 200 m creates a decrease 0.1 % in its volume at the bottom. The bulk modulus of the material of the ball will be
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The diagram shows a force-extension graph for a rubber band. Consider the following statements:
I. It will be easier to compress this rubber than expand it.
II. Rubber does not return to its original length after it is stretched.
III. The rubber band will get heated if it is stretched and released.

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Which of these can be deduced from the graph:

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A wire breaks when subjected to a stress S. If ρ is the density of the material of the wire, then the length of the wire so that it breaks by its own weight is
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A steel ring of radius r and cross-section area 'A' is fitted on to a wooden disc of radius R (R>r). If Young's modulus be E, then the force with which the steel ring is expanded is
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A copper wire of length 2.2 m and a steel wire of length 1.6 m both of diameter 3.0 mm are connected end to end. When stretched by a force, the elongation in length 0.50 mm is produced in the copper wire. The stretching force is YCu=1.1×1011 N m-2, Ysteel =2.0×1011 N m-2