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प्रश्न
Answer the following question.
Describe what is meant by order of magnitude.
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उत्तर
Order of magnitude:
The magnitude of any physical quantity can be expressed as A × 10n where ‘A’ is a number such that 0.5 ≤ A < 5 then, ‘n’ is an integer called the order of magnitude.
Examples:
- Speed of light in air = 3 × 108 m/s ∴ order of magnitude = 8
- Mass of an electron = 9.1 × 10-31 kg = 0.91 × 10–30 kg
∴ order of magnitude = – 30.
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संबंधित प्रश्न
How many significant figures are present in the 208?
How many significant figures are present in the 126,000?
Round up the following upto three significant figures:
34.216
Round up the following upto three significant figures:
0.04597
How many significant figures should be present in the answer of the following calculation:-
`(0.02856 xx 298.15 xx 0.112)/0.5785`
How many significant figures should be present in the answer of the following calculation?
5 × 5.364
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0.2370 g cm–3
State the number of significant figures in the following:
6.032 N m–2
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Assertion (A): Significant figures for 0.200 is 3 where as for 200 it is 1.
Reason (R): Zero at the end or right of a number are significant provided they are not on the right side of the decimal point.
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The radius of Earth is expressed as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude and number of significant figures?
Which of the following statements is correct about significant figures and accuracy?
