Quantities
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Questions and Answers

Which of the following best defines measurement in physics?

  • A quantity that has both a number and a unit. (correct)
  • Observation and measurement of the physical world.
  • The act of comparing a physical quantity to a unit.
  • The ratio of a physical quantity to the unit.

    • What is the difference between precision and accuracy?

  • Precision refers to the closeness of a measurement to the true value, while accuracy refers to the closeness of a set of measurements to each other.
  • Precision refers to the closeness of a set of measurements to each other, while accuracy refers to the closeness of a measurement to the true value. (correct)
  • Precision and accuracy are not important in physics.
  • Precision and accuracy are the same thing.

    • What is the formula for determining the number of significant figures in a given measurement?

  • Count the number of digits from the first non-zero digit to the last digit. (correct)
  • Count the number of zeros after the decimal point.
  • Count the number of zeros before the decimal point.
  • Count the total number of digits in the measurement.

    • Which of the following best describes the concept of fundamental quantities in physics?

    <p>Quantities that cannot be derived from other quantities.</p> Signup and view all the answers

    What is the purpose of converting units in physics?

    <p>To compare measurements with different units.</p> Signup and view all the answers

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