I asked Mr. Randall about sig figs for this lab, especially on instruments like the vernier caliper and micrometer. This was his answer:
"For lengths smaller than 1 cm, you should get at least 2 sigs: 0.??. (To the 100th place, 0.01.)
Between 1 cm and 9.99 cm, you should get 3: ?.??
The...