Question

significant figures in 0.1250 and 9.010​

Answer 1

Explanation:

Solution

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(a) The ±0.2 following the 78.9 expresses uncertainty in the last digit. Therefore, there are three significant figures in 78.9±0.2.

(b) Scientific notation is often used to remove the ambiguity of the number of significant figures in a number. Therefore, all the digits in 3.788 are significant, and 3.788∗109 has four significant figures.

(c) Similarly, 2.46 has three significant figures, therefore 2.46∗10−6 has three significant figures.

(d) Zeros used to position the decimal point are not significant. Therefore 0.0053 has two significant figures.

Uncertainty in a measurement can be the result of a number of factors, including the skill of the person doing the measurements, the precision and the quality of the instrument used, and the number of measurements made.