If a length is measured as 150.0 cm, how many significant figures does this meas

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Question: If a length is measured as 150.0 cm, how many significant figures does this measurement have?

Options:

Correct Answer: 4

Solution:

The measurement 150.0 cm has 4 significant figures because the trailing zero after the decimal point is significant.

If a length is measured as 150.0 cm, how many significant figures does this measurement have?

If a length is measured as 150.0 cm, how many significant figures does this measurement have?

Step 1: Identify the digits in the measurement 150.0 cm.
Step 2: Count all non-zero digits. In this case, 1 and 5 are non-zero.
Step 3: Count the zeros. The zero between 1 and 5 is significant because it is between non-zero digits.
Step 4: The zero after the decimal point (the last zero) is also significant because it indicates precision.
Step 5: Add up all the significant figures: 1 (from 1) + 1 (from 5) + 1 (from the zero between) + 1 (from the zero after the decimal) = 4 significant figures.

Significant Figures – Understanding how to identify significant figures in a measurement, including the rules for zeros.