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Chapter 1: Q3. (page 17)
How many significant figures does the number 0.0078 have?
(a) 1.(b) 2.(c) 3.(d) 4.
The given number has two significant figures.
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Global positioning satellites (GPS) can be used to determine your position with great accuracy. If one of the satellites is 20,000 km from you, and you want to know your position to, what percent uncertainty in the distance is required? How many significant figures are needed in the distance?
Four students use different instruments to measure the length of the same pen. Which measurement implies the greatest precision?
(a) 160.0 mm
(b) 16.0 cm
(c) 0.160 m
(d) 0.00016 km
(e) Need more information
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