Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is uncertainty?
💡 Hint: Think of how precise your measurements can be.
Question 2
Easy
Define random error.
💡 Hint: Consider examples where you notice fluctuations.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is uncertainty in measurements?
- A fixed value
- The range of expected true value
- An exact number
💡 Hint: Think about how reliable our measurements can be.
Question 2
True or False: Systematic errors vary unpredictably.
- True
- False
💡 Hint: Consider how each type of error manifests.
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Challenge Problems
Push your limits with challenges.
Question 1
An experiment yields a measurement believed to be 20 g, but the balance was uncalibrated, causing a systematic error resulting in an actual weight of 19.5 g. Calculate the percentage error between the expected and actual weight.
💡 Hint: Compare the values and remember to use the absolute value.
Question 2
You conducted an experiment with a concentration result of 0.50 mol/L and a percentage uncertainty of 10%. Another lab has a known value of 0.45 mol/L. Is your measurement reliable, or does it suggest a systematic error?
💡 Hint: Remember to compare the percentage uncertainty with the calculated percentage error.
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