A measurement of 30 m has an error of ±0.1 m. What is the true value if the meas

Practice Questions

Q1
A measurement of 30 m has an error of ±0.1 m. What is the true value if the measurement is taken as the average?
  1. 30.1 m
  2. 30 m
  3. 29.9 m
  4. 30.05 m

Questions & Step-by-Step Solutions

A measurement of 30 m has an error of ±0.1 m. What is the true value if the measurement is taken as the average?
  • Step 1: Identify the measured value, which is 30 m.
  • Step 2: Identify the error, which is ±0.1 m.
  • Step 3: Calculate the lower limit of the measurement by subtracting the error from the measured value: 30 m - 0.1 m = 29.9 m.
  • Step 4: Calculate the upper limit of the measurement by adding the error to the measured value: 30 m + 0.1 m = 30.1 m.
  • Step 5: Now you have two values: 29.9 m (lower limit) and 30.1 m (upper limit).
  • Step 6: To find the true value, take the average of the lower and upper limits: (29.9 m + 30.1 m) / 2.
  • Step 7: Calculate the average: (29.9 + 30.1) / 2 = 30.0 m.
  • Step 8: The true value is 30.0 m.
  • Measurement and Error Analysis – Understanding how to interpret measurements with associated errors and calculating true values.
  • Averaging Values – The process of finding the average of two or more values, particularly in the context of measurements and their uncertainties.
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