Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is absolute uncertainty?
💡 Hint: Think about how a ruler marks measurements.
Question 2
Easy
If a graduated cylinder shows 25.0 mL with a scale of 0.1 mL, what is the absolute uncertainty?
💡 Hint: Use half of the smallest division.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does absolute uncertainty represent?
- The difference from the true value
- The range in which the true measurement lies
- The total possible error
💡 Hint: Think about how we express measurements.
Question 2
True or False: Percentage uncertainty allows comparison of measurements with different units.
- True
- False
💡 Hint: Percentage uncertainty is uniform for direct comparisons.
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Challenge Problems
Push your limits with challenges.
Question 1
You measure the mass of a chemical as 15.0 ± 0.1 g and the volume as 20.0 ± 0.2 mL. Calculate the density and the associated uncertainty.
💡 Hint: Use the techniques for propagation of uncertainties learned earlier!
Question 2
A reaction produces a gas whose volume is recorded as 30.0 ± 0.5 mL every minute for 5 minutes. Calculate the total volume produced and its uncertainty.
💡 Hint: Remember to multiply for the total but pay attention to how the uncertainty adds up!
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