Answer
$mg$.
Work Step by Step
A contact lens is very light. Thus, to measure its weight we use units of $mg$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 3 - Section 3.3 - Mass and Weight - Exercise - Page 143: 23
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