Can you explain the answer of this question below:The numbers of significant figures in 9.1 x10-31kg are:A:threeB:twoC:tenD:twenty oneThe answer is b.

Question

Answer

As the power of 10 is irrelevant to the determination of significant figures hence, the numbers of significant figures are 2 (9 and 1).

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There r 2 significant figures...in the given question..

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You should revise significant figures from ncert. i can answer this but this will not help you to clear your whole doubt but if you revise ncert, you will never stuck with this kinda questions. believe me.

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There are only two significant figures because according to the law 'for a number with a decimal ,the trailing zero(s) are significant ' and the digit after decimal in this case is greater than 0

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The number given is 9.1 x 10^(-31) kg. To determine the number of significant figures in this number, we need to follow a set of rules:

1. Non-zero digits: All non-zero digits are significant. In this case, the digit 9 is non-zero, so it is significant.

2. Leading zeros: Leading zeros, which appear before any non-zero digits, are not significant. In this case, there are no leading zeros.

3. Trailing zeros: Trailing zeros, which appear after any non-zero digits, are significant if they are after a decimal point. In this case, there are no trailing zeros after a decimal point.

4. Zeros between non-zero digits: Zeros between non-zero digits are significant. In this case, there are no zeros between non-zero digits.

Based on these rules, we can determine the number of significant figures in 9.1 x 10^(-31) kg:

- The digit 9 is significant.
- The digit 1 is significant.
- The exponent (-31) does not affect the number of significant figures.

Therefore, there are two significant figures in the given number.

In summary:
- The number 9.1 x 10^(-31) kg has two significant figures.
- The significant figures are the digits 9 and 1.
- The exponent (-31) does not affect the number of significant figures.

Answer

Only 2 significant digits...This might be useful for you: 'Learn significant figures in easy way by Vivek Phalake '

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