
Concept explainers
(a)
Interpretation:The number of significant figures in 121 needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(a)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
(b)
Interpretation: The number of significant figures in 0.409 needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(b)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is 0.409. Here, 2 digits are non-zeros and 1 is zero which is between two non-zero digits thus, the number of significant figure is 3. =
(c)
Interpretation:The number of significant figures in 27010 needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(c)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
There are 3 non-zero digits and 2 zeroes. 1 is trailing zero and 1 zero is between two non-zeros. Thus, the trailing zero is not significant. Thus, number of significant figures in given number is 4.
(d)
Interpretation: The number of significant figures needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(d)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
There are 2 zeros which are not trailing zeros Also, there are 3 non-zero digits.
Significant figure for
(e)
Interpretation: The number of significant figures in 9740 needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(e)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
When zero is present right to the non-zero number and if no decimal is present, it is not significant,
Thus, only three non-zeroes digits are significant.
Significant figure for
(f)
Interpretation: The number of significant figures needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(f)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
Here, 4 non-zero digits and 2 zeros are present. The two zeroes are trailing zeroes after decimal thus, total number of significant figures is 6.
(g)
Interpretation: The number of significant figures in 2002 needs to be determined.
Concept Introduction : Significant figures of a number are termed as digits which contribute to the precision of that number.Any measurement involves an estimate and thus is uncertain to some extent. A reliably identified digit used to find a decimal point is known as significant figure.
(g)

Answer to Problem 4RQ
Explanation of Solution
The number of meaningful digits in a calculated quantity is known as significant figures. All non- zero digits are significant and leading zeros are never count as significant but captive zeros are significant.
The given number is
Significant figure for
Chapter 5 Solutions
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