How many significant figures are there in 0.4793?
Correct answer: B. 4
- A. 3
- B. 4
- C. 5
- D. 6
Explanation
The following is the solution: The number 0.4793 has four significant figures. In the context of significant figures: Non-zero digits are always considered significant. In this case, 4, 7, 9, and 3 are non-zero digits. Zeros between significant digits are also considered significant. There are no zeros between the significant digits in 0.4793. Leading zeros (zeros to the left of the first non-zero digit) are not considered significant. In this case, there are no leading zeros. Trailing zeros (zeros to the right of the last non-zero digit) in a decimal number are considered significant. In 0.4793, the zero after 3 is a trailing zero and is considered significant. Therefore, all four digits in 0.4793 are considered significant, making it a number with four significant figures.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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