MCQ
When temperature of water is raised from $O\ 'C$ to $4^\circ C,$ it:
- AExpands.
- ✓Contracts.
- CExpands upto $2^\circ C$ and then contracts upto $4^\circ C.$
- DContracts upto $2^\circ C$ and then expands upto $4^\circ C.$
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Assertion $A :$ Moment of inertia of a circular disc of mass $'M'$ and radius $'R'$ about $X, Y$ axes (passing through its plane) and $Z-$axis which is perpendicular to its plane were found to be $I_{x}, I_{y}$ and ${I}_{z}$ respectively. The respective radii of gyration about all the three axes will be the same.
Reason $R$ : A rigid body making rotational motion has fixed mass and shape.
In the light of the above statements, choose the most appropriate answer from the options given below :
[Neglect any heat loss to the surrounding.|