THE PRACTICE STUDIO

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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Micrometer screw gauge

A stack carries one zero offset

A micrometer indicates 2.38 mm for 30 identical sheets stacked together. Its signed closed-face indication is −0.02 mm.

What is the inferred average sheet thickness?

Organize the givens & assumptions
  • 30 sheets
  • Indicated stack = 2.38 mm
  • z = −0.02 mm

Exact sheet count; negligible trapped air, compression and sheet variation; stable additive calibration offset.

  1. A0.080 mm0.080\ \mathrm{mm}
  2. B0.07933… mm0.07933\ldots\ \mathrm{mm}
  3. C0.07866… mm0.07866\ldots\ \mathrm{mm}
  4. D0.09933… mm0.09933\ldots\ \mathrm{mm}

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