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Express your answers to problems

Chapter 1, Problem 19

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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?

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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%

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