Identifying the Mass Measurement with Four Significant Figures- A Comprehensive Guide

Which mass measurement contains four significant figures? This question is often encountered in scientific and engineering fields, where precise measurements are crucial for accurate calculations and results. In this article, we will explore the concept of significant figures and discuss how to identify a mass measurement with four significant figures.

Significant figures, also known as significant digits, are the digits in a number that carry meaning in terms of precision. They include all the digits that are known with certainty, plus one uncertain digit. In other words, significant figures indicate the level of accuracy of a measurement. For example, the number 0.00345 has three significant figures, while the number 100.0 has four significant figures.

To determine the number of significant figures in a mass measurement, follow these guidelines:

1. Non-zero digits are always significant. For instance, in the number 123.456, all the digits are significant.
2. Zeros between non-zero digits are also significant. For example, in the number 102, the zero between the 1 and the 2 is significant.
3. Leading zeros (zeros to the left of the first non-zero digit) are not significant. For instance, in the number 0.00456, the zeros before the 4 are not significant.
4. Trailing zeros (zeros to the right of the last non-zero digit) are significant if they are after a decimal point. For example, in the number 100.0, the zero after the decimal point is significant.

Now, let’s identify a mass measurement with four significant figures. Consider the following examples:

– 0.01234 kg: This measurement has four significant figures because all the digits are non-zero and there are no leading or trailing zeros.
– 12.34 kg: This measurement also has four significant figures, as all the digits are non-zero and there are no leading or trailing zeros.
– 100.0 kg: This measurement has four significant figures, with the trailing zero after the decimal point being significant.

In conclusion, when identifying a mass measurement with four significant figures, pay attention to the presence of non-zero digits, leading and trailing zeros, and the position of the decimal point. By following these guidelines, you can ensure accurate and precise measurements in scientific and engineering applications.