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What is the order of magnitude of radius...

What is the order of magnitude of radius of earth ?

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`R = 6400 km = 6.4 xx 10^6 m ~= 10xx10^6 m`
`= 10^7m`
Order of magnitude of R is 7.
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PRADEEP-PHYSICAL WORLD AND MEASUREMENT-Very short Answer Questions
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  2. What is the order of magnitude of 499 and 0.050 ?

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  3. What is the order of magnitude of radius of earth ?

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  6. Which insturment is used for measuring distance upto 10^(-4)m ?

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  11. What is the order of mean free path of an aire molecule ?

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  12. What is the smallest mass measured indirectly so far?

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  14. What is meant by angular diameter of moon ? What is its value?

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  15. What is the order of mass fo uiverse.

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