In any measurement the significant figures are______________?
Correct answer: D. All accurately known digits and the first doubtful digit
- A. All accurately known and all doubtful digits
- B. Only accurately known digits
- C. Only doubtful digits
- D. All accurately known digits and the first doubtful digit
Explanation
A measurement contains all digits known with certainty plus one final digit that is estimated or doubtful. Thus the first doubtful digit is included, whereas students choosing a incorrectly include every doubtful digit beyond the first.
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