Chapter 2.pptx - Numbers Numbers Everywhere But Not A...

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CHAPTER 2 MEASUREMENT AND PROBLEM SOLVING Numbers, Numbers Everywhere, But Not A Decimal To Think.
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MEASURED VALUES
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MEASURED VALUES A numerical value. A unit of measurement. The name of what is being measured.
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EXAMPLE The sample is 256 grams of lead.
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EXAMPLE The sample is 256 grams of lead. Numerical Value = 256 Unit of measurement = grams Identity = lead
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INTERNATIONAL SYSTEM OF UNITS (SI)
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INTERNATIONAL SYSTEM OF UNITS (SI) The metric system with a few added bells and whistles. Yes, you can blame the French.
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INTERNATIONAL SYSTEM OF UNITS (SI) Consists of a set of base units , a set of derived units with specific names, and a set of decimal-based multipliers that are used as prefixes .
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BASE UNITS These are the building blocks of SI. All of the other units of measure can be derived from these base units.
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BASE UNIT MASS Kilogram Unit symbol = kg.
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BASE UNIT LENGTH Meter Unit symbol = m.
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BASE UNIT TIME Second Unit symbol = s.
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PREFIX MULTIPLIERS Prefixes are added to unit names to change the value of the unit by powers of 10.
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PREFIX MULTIPLIERS All of the multipliers are integer powers of ten, and above a hundred and below a hundredth all are integer powers of a thousand. The prefixes never combine, and multiples of the kilogram are named as if the gram were the base unit. So a millionth of a kilogram is a milligram, not a microgram.
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DERIVED UNITS A derived unit is formed from other units. They are formed by powers, products or quotients of the base units and are unlimited in number.
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DERIVED UNITS In chemistry, many units of volume , a measure of space, are derived units. Any unit of length when raised to the third power (cubed) becomes a unit of volume.
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VOLUME Believe it or not, the liter is actually not an SI unit. The SI unit of volume is the cubic meter.
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VOLUME Liters are usually used for items measured by the capacity of their container and cubic meters are usually used for items measured either by their dimensions or their displacements.
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VOLUME Let’s just pretend that the liter is a base unit, okay.
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CONVERTING BETWEEN UNITS Rules for converting units.
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  • Spring '16
  • RexJ.Gamble
  • International System of Units

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