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        <div id="content-top1">Page 12 - 9-phy-1 Physical Quantities and Measurements</div>
        <div id="content-top2">P. 12</div>
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    <pre style="white-space:pre-line"><code>1. Physical Quantities and Measurements                                                              eLearn.Punjab

QUICK QUIZ
1. Name five prefixes most commonly used.
2. The Sun is one hundred and fifty million kilometres away
     from the
      Earth. Write this

     (a) as an ordinary whole number.
    (b) in scientific notation.
3. Write the numbers given below in scientific notation.
     (a) 3000000000 ms-1 	 	 (b) 6400000 m
     (c) 0.0000000016 g 	 	 (d) 0.0000548 s

                                                                 Animation 1.5: Scientific Notation
                                                                 Source & Credit: privatekgsmaths

1.6 MEASURING INSTRUMENTS

Measuring instruments are used to measure various physical quantities such as length, mass, time,

volume, etc. Measuring instruments used in the past were not so reliable and accurate as we use

today.  12</code></pre>
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