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5 cards from this section. Quick, good the night before a test.
Define accuracy in the context of measurements.
Think about a target and where your arrows land.
What is a random error?
Consider fluctuations in a digital balance.
What type of error affects measurements consistently in the same direction?
Think about consistent measurement biases.
True or False: All measurements have some level of uncertainty.
Consider the limitations of scientific instruments.
You measure the length of a tabletop three times and get 120.0 cm, 120.2 cm, and 119.7 cm. What is the average length and the uncertainty associated with this average?
Calculate the mean and then find the standard deviation to determine uncertainty.
You have a weighing scale that consistently gives readings that are 3 grams higher than the true weight. If you measure an object that weighs 50 grams, what is your reported weight?
Remember, systematic errors should be accounted for in your final reported measurements.
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