Final answer:
The statement is false; length measures distance not the quantity of matter, which is instead related to mass or volume.
Step-by-step explanation:
The statement 'Length is the quantity of matter present in an object' is false. Length is actually a measure of distance, specifically the numerical measurement of how far apart objects or points are. In contrast, the quantity of matter in an object is more closely related to its mass or volume.
Mass is a measure of the total quantity of matter in an object, while volume is a measure of the space occupied by an object. For example, length can be measured in meters for larger distances or micrometers for small distances such as the width of a human hair, which is about 10 micrometers (μm).
Chemists and physicists use different units to express these quantities, and they often perform dimensional analysis (unit conversions), which involves the use of conversion factors that cancel unwanted units to obtain the desired ones.
This helps in comparing measurements that have been taken using different units.