Physics IX Unit 1: Physical Quantities and Measurement Quiz
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Questions and Answers

When rounding a number, if the last digit is less than 5, what happens to the number of significant figures?

  • It depends on the number
  • It increases
  • It remains the same
  • It decreases (correct)

    • In scientific notation, how is 100.8 s expressed?

  • $0.1008 \times 10^3$ s
  • $10.08 \times 10$ s
  • $1.008 \times 10^2$ s (correct)
  • $1.08 \times 10$ s

    • How many significant figures are there in 0.00580 km?

  • 2
  • 5
  • 3 (correct)
  • 4

    • If the last digit is 5 when rounding a number, what rule is followed to determine the new digit?

    <p>It is rounded to get nearest even number</p> Signup and view all the answers

    What happens to the number of significant figures when zeros are used to space the decimal point?

    <p>They remain insignificant</p> Signup and view all the answers

    Expressing 1.47 with two significant figures results in which number?

    <p>$1.5$</p> Signup and view all the answers

    In the value 210.0 g, how many zeros are considered as significant figures?

    <p>$4$</p> Signup and view all the answers

    If a digit is increased by one when rounding a number, what could happen to the number of significant figures?

    <p>It decreases</p> Signup and view all the answers

    'The zeros between two significant figures are also significant' - this statement is true when discussing:

    <p>'significant figure rules'</p> Signup and view all the answers

    'If the last digit is greater than 5, then the digit on its left is increased by one.' This statement refers to which rounding principle?

    <p>'Round up to next whole number'</p> Signup and view all the answers

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