Question

0.02340nm-¹ significance figure

Answer 1

0.02340 nm-¹ has four significant figures.

Rules for Determining the Number of Significant Figures -

• All the non zero numbers are included as significant figures.

• A zero becomes significant if it comes between two non zero numbers.

• If any notation is given in exponential form then the numerical portion is counted as the significant figure.

• A decimal can't change the number of significant figures.

Answer 2

Answer:

0.02340 Nm⁻¹ has four significant figures.

Explanation:

• The significant or key digits that accurately represent the meaning of a certain number are known as the significant figures of that number.
• These significant figures give precision to the number

Rules for significant figures:-

• Non-zero digits are all significant.
• All zeros are significant between any two non-zero digits 
• All zeros to the right of a decimal point, as well as those to the left of a non-zero digit, are never significant.
• All of the zeros to the right of the final non-zero digit after the decimal point are significant.
• If the zeros to the right of the last non-zero digit are part of a measurement, they are all significant.

Because there are two following zeroes before in the given number, they are not significant. On the other hand, the zeroes on the right side of the decimal place, are significant.

Hence, 2,3,4,0 are significant.

∴ 0.02340 Nm⁻¹ has four significant figures.

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