18. (a) How many significant figures are in the numbers 99 and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?

18. (a) How many significant figures are in the numbers 99 and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Estimate of calculation

Question

Answer to question 18

00
17. State how many significant figures are proper in the
results of the following calculations: (a)
(106.7)(98.2)/(46.210) (1.01) (b) (18.7)² (c)
1
(1.60x10-¹9) (3712).
18. (a) How many significant figures are in the numbers 99
and 100? (b) If the uncertainty in each number is 1, what is
the percent uncertainty in each? (c) Which is a more
meaningful way to express the accuracy of these two
numbers, significant figures or percent uncertainties?
19. (a) If your speedometer has an uncertainty of 2.0 km/h
at a speed of 90 km/h, what is the percent uncertainty? (b)
If it has the same percent uncertainty when it reads 60 km/
what is the range of speeds you could be going?
20. (a) A person's blood pressure is measured to be
uncertainty? (b)

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