Significant Figures

Front

How many significant figures are in the measurement 2.51 m?

Back

3 significant figures.

Front

What are significant figures?

Back

They are the reliably known digits that a measurement contains.

Front

Calculate the sum of 25.085 m and 16.2 m, including the correct number of significant figures.

Back

41.3 m.

Front

How many significant figures are in the measurement 5.0 × 10^2 s?

Back

2 significant figures.

Front

Round the measurement 787.985 kg to 5 significant figures.

Back

787.99 kg.

Front

What is the rule for determining significant figures in a measurement?

Back

All non-zero digits are significant; zeros between significant digits are significant; leading zeros are not significant; trailing zeros in a decimal number are significant.

Front

How many significant figures are in the number 0.00456?

Back

3 significant figures.

Front

What is the result of multiplying 3.00 by 2.5, considering significant figures?

Back

7.5.

Front

How do you express 0.000123 in scientific notation?

Back

1.23 × 10^-4.

Front

What is the significance of significant figures in scientific measurements?

Back

They indicate the precision of a measurement.