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Lesson: Using Significant Figures

Worksheet: Using Significant Figures • 6 Questions

Q1:

Perform the following calculations and express your answer using the correct number of significant digits.

A woman has two bags weighing 13.5 lb and one bag with a weight of 10.2 lb. What is the total weight of the bags?

The force on an object is equal to its mass multiplied by its acceleration . If a wagon with mass 55 kg accelerates at a rate of 0.0255 m/s2, what is the force on the wagon?

Q2:

A speedometer has an uncertainty of 3.0 km/h at a speed of 98 km/h.

What is the percent uncertainty of the speedometer?

Assuming that the percent uncertainty in the speedometer at 60 km/h is the same as at 98 km/h, what is maximum difference between the speed indicated by the speedometer and the speed that you might be moving at?

Q3:

A person measures his or her heart rate by counting the number of beats in 40 s. beats are counted in s.

What is the person’s heart rate in beats per minute?

What is the uncertainty in the person’s heart rate, in beats per minute?

Q4:

The sides of a small rectangular box are measured to be cm, cm, and cm long.

Calculate the box’s volume in cubic centimeters.

Calculate the uncertainty in the box’s volume in cubic centimeters.

Q5:

Determine the number of significant figures in the following measurement 0.007.

Determine the number of significant figures in the following measurement .

Determine the number of significant figures in the following measurement .

Determine the number of significant figures in the following measurement 57.0320.

Determine the number of significant figures in the following measurement 600.24.

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