Final answer:
An inside micrometer must be larger than the dimension being measured to provide an accurate measurement, thanks to its ability to measure small increments precisely. The micrometer's precision assures closer approximations to the actual sizes of objects. The tool needs to be square to the dimension for accurate expansion and reading.
Step-by-step explanation:
To provide an accurate measurement, an inside micrometer must be larger than the dimension being measured. A micrometer is a precision measuring tool that can measure values in very small increments, allowing for more precise and accurate measurements compared to standard rulers. The micrometer serves as an effective tool because it can precisely measure internal dimensions of an object by being adjusted outward until it meets the internal walls of the object being measured.
The precision of measuring tools is crucial to achieving accurate measurements. For instance, while a ruler can measure to the nearest millimeter, a micrometer can measure dimensions to even smaller increments, such as 0.005 millimeter. This high level of precision ensures that measurements are close to the actual sizes of the objects being measured. Therefore, the micrometer must be able to extend beyond the minimum measurement, justifying why it needs to be larger than the dimension being measured.
In practice, an inside micrometer is used by expanding it within the space to be measured until it fits snugly, then reading the value to obtain a highly precise measurement. Being square to the dimension being measured ensures that this expansion is even and the measurement is accurate.