Question

The number of significant figures in the quantity 5.6200 J is:

• A. 3
• B. 5
• C. 2
• D. 4

Hint:

In decimal numbers, trailing zeros are always significant and indicate measurement precision.

Answer 1

The Correct Option is B

Step 1: Quantity presented.
The value is 5.6200 J, a decimal number requiring significant figure counting.

Step 2: Significance rules.
Non-zero digits are always significant; zeros between non-zero digits are significant; trailing zeros after a decimal point are significant.

Step 3: Digit analysis.
The digits 5, 6, 2, and the two trailing zeros all qualify as significant.

Step 4: Total count.
This gives five significant figures.

Step 5: Verification.
No leading zeros exist; every digit contributes to the measurement's precision.

Step 6: Conclusion.
Therefore, the number of significant figures is 5.