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Units and Measurement
Question
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Which method is used to measure the distance of inferior planets from the sun?

Answer

Copernicus method can be used to measure the distance of inferior planets from the Sun.
This method is basically used to find the distance between those planets which are near to sun rather than that of earth. The assumption used in this method is, orbits in which the planets are moving is circular. 

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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?