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Units and Measurement
Question
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About which axis the moment of inertia of ring is minimum?

Answer

The moment of inertia of ring about diameter is minimum. This is because the entire mass of the ring is concentrated at it's periphery. 

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Some More Questions From Units and Measurement Chapter

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?