What is a primary function of a scale?

A scale is specifically designed to weigh objects by measuring their mass or weight against the force of gravity. This tool is essential in various settings, such as kitchens for cooking, laboratories for scientific experiments, and medical facilities for checking patient weight.

The other functions listed pertain to different tools or instruments. Measuring length typically requires a ruler or tape measure; calculating speed involves a speedometer or similar device; and determining temperature is the role of a thermometer. Each of these options serves a distinct purpose that does not overlap with the primary function of a scale.