College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 1, Problem 20PE
(a) A person's blood pressure is measured to be
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(a) A person's blood pressure is measured to be 104 ± 2 mm Hg. What is its percent uncertainty? (Note that percent uncertainties should be reported to two significant figures.) %
(b) Assuming the same percent uncertainty, what is the uncertainty in a blood pressure measurement of 80 mm Hg? (Note that uncertainties should be reported to one significant figure.). mm Hg
(a) A person’s blood pressure is measured to be 120+2 mm Hg. What is its percent uncertainty? (b) Assuming the same percent uncertainty, what is theuncertainty in a blood pressure measurement of 80mm Hg?
(a)
How many significant figures are in the numbers 999.0 and 1000.0?
999.01000.0
(b)
If the uncertainty in each number is 10, what is the percent uncertainty in each? (Give your answer to 4 significant figures.)
999.0 %1000.0 %
(c)
Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?
Chapter 1 Solutions
College Physics
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