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Physical Quantities

Physical Quantities. There are 2 main parts to a physical quantity. 5.01 H 10 2 km. {. {. Number Unit. 320 mL. {. {. Number Unit. The number contains 2 pieces of information. value and an indication of precision. 320 - value is 320 (obvious?).

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Physical Quantities

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  1. Physical Quantities

  2. There are 2 main parts to a physical quantity 5.01 H 102 km { { Number Unit 320 mL { { Number Unit

  3. The number contains 2 pieces of information value and an indication of precision 320 - value is 320 (obvious?) The precision is indicated by the "0" This is referred to as the "least significant figure" or "... digit."

  4. Examples of least significant digits: 320 !"0" is the least significant digit 12.01 !"0.01" is the least significant digit 1.2200 !"0.0000" is the least significant digit 5.13H105!"0.03H105"or "3H103"is the least significant digit.

  5. Units also consist of two parts - the prefix and the nonprefixed part: nm - "nanometer" - "n" is the prefix ("nano") and "m" is the unprefixed part ("meter") kg - "kilogram" - "k" is the prefix ("kilo") and "g" is the unprefixed part ("gram") Sometimes there is no prefix: K - "kelvins" m - "meters"

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