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प्रश्न
State the number of significant figures in the following:
0.007 m2
उत्तर
0.007 m2 has one significant figure.
Explanation:
If the number is less than one, then all zeros on the right of the decimal point (but left to the first non-zero) are insignificant. This means that here, two zeros after the decimal are not significant. Hence, only 7 is a significant figure in this quantity.
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संबंधित प्रश्न
What do you mean by significant figures?
How many significant figures are present in the 500.0?
How many significant figures are present in the 2.0034?
Round up the following upto three significant figures:
10.4107
Round up the following upto three significant figures:
2808
Precise measurements of physical quantities are a need of science. For example, to ascertain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.
Answer the following question.
Describe what is meant by significant figures.
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.
If the density of a solution is 3.12 g mL–1, the mass of 1.5 mL solution in significant figures is ______.
Why do we have different units for the same physical quantity?
