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Express your answers to problems
Chapter 1, Problem 19(choose chapter or problem)
Problem 19PE
Express your answers to problems in this section to the correct number of significant figures and proper units.
(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/h , what is the range of speeds you could be going?
Questions & Answers
QUESTION:
Problem 19PE
Express your answers to problems in this section to the correct number of significant figures and proper units.
(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/h , what is the range of speeds you could be going?
ANSWER:
Solution
Step 1
a) The uncertainty of speedometer is at a speed .
The percentage of uncertainty = 100%
percentage of uncertainty = 100% =2.22%