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1.3 Length and Unit Conversions

1.3 Length and Unit Conversions. Objective. Convert length units within and between measurement systems. Meter – basic unit of length in the metric system. Defined as 1 ten-millionth of the distance from the equator to either pole. Currently defined by the speed of light.

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1.3 Length and Unit Conversions

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  1. 1.3 Length and Unit Conversions

  2. Objective Convert length units within and between measurement systems.

  3. Meter – basic unit of length in the metric system. • Defined as 1 ten-millionth of the distance from the equator to either pole. • Currently defined by the speed of light. • Meter = the distance light travels in 1/300 000 000 of a second

  4. U.S. Length • Basic unit is the foot 1 ft = 12 in 1 yd = 3 ft 1 mi = 5280 ft

  5. Metric-U.S. Equivalents 1 in = 2.54 cm 1 mi = 1.61 km 1 cm = 0.394 in

  6. Conversion Factor • Conversion factor – an expression used to change from one unit or set of units to another. • Derived from equivalent measures • Equal to 1

  7. General Process for Converting

  8. Sample Problems Change 4 m to cm Change 39.5 mm to cm Convert 84 in to ft Express 60 in in cm Change 15 mi to km Convert 220 cm to in Change 3 yd to cm

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