Which of the following measurements has the highest precision?
A) the height of the classroom wall (around 300 cm) with uncertainty of 3 cm
B) the depth of a canyon (around 1800 m) with uncertainty of 15 m
C) the thickness of human hair (0.0001 m) with uncertainty of 0.00003 m
D) the mass of 1 kg with the uncertainty of 0.005 g
Correct Answer:
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