Question

what is the correct micrometer reading? .715\ .768\ 7.35\ .725\ © youscience, 2025

Explanation:

Step1: Identify main - scale reading

The main - scale reading of the micrometer is 0.7 inches (since it is past the 0.7 - inch mark and not yet to the 0.8 - inch mark).

Step2: Identify thimble - scale reading

The thimble - scale has 25 divisions per 0.025 inches. Each division is 0.001 inches. The thimble - scale reading is 25 (as the 25th division is aligned with the main - scale line). So the thimble - scale contribution is 0.025 inches.

Step3: Calculate total reading

The total reading is the sum of the main - scale and thimble - scale readings. Total reading = 0.7+0.025 = 0.725 inches.

Answer:

.725"