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Flashcards for Unit 1
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Matter Anything that has mass & occupies space.
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7 How many fundamental units in the SI system?
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Fundamental or Base Unit
Physical quantity that must be measured. It cannot be calculated.
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Derived Unit A unit defined as a combination of fundamental units.
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Unit of mass Kilogram Fundamental Unit
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Unit of time Second Fundamental Unit
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Unit of length Meter Fundamental Unit
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Unit of temperature Kelvin Fundamental Unit
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Space or Capacity Volume Derived Unit
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Metric Unit of Volume 10 cm X 10 cm 10 cm Liter Derived Unit
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1000 cm3 = 1 Liter ? cm3 = 1 Liter Derived Unit
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1000 mL = 1 Liter ? milliliter = 1 Liter Derived Unit
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1 mL = 1 cm3 ? milliliter = 1 cm3 Derived Unit
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What is the mass of 1 liter of pure H2O?
1 kilogram What is the mass of 1 liter of pure H2O? Mass/Volume relationship
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What is the mass of 1 cm3 of pure H2O?
1 gram What is the mass of 1 cm3 of pure H2O? Mass/Volume relationship
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Freezing Point of water in the Kelvin scale.
Physical Constant
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Boiling Point of water in the Kelvin scale.
Physical Constant
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Freezing Point of water in the centigrade scale.
Physical Constant
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Boiling Point of water in the centigrade scale.
Physical Constant
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Another name for freezing point.
Ice / water equilibrium
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Another name for boiling point.
Steam / water equilibrium
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100 cm = 1 meter ? cm in 1 meter Conversion Fact
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1000 mm = 1 meter ? mm in 1 meter Conversion Fact
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1000 m = 1 kilometer ? m in 1 km Conversion Fact
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Mass / Volume Density
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Describes how matter is packed into space.
Density
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grams / cm3 Units of Density
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M D V Density
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How close a measured value is to an accepted value.
Accuracy
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How close a series of measurements are to one another.
Precision
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Measured value – Accepted value x 100%
Percent Error Table T, reference tables
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K = C + 273 C to K Table T, reference tables
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Scientific Notation The number is written as a product of 2 numbers:
- a number between 1 & 10 - a power of 10 Scientific Notation
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Negative exponent so the number is between 0 and 1:
0.002 2 X 10-3
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Positive exponent so the number is greater than 1:
500 5 X 102
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All known digits plus 1 estimated digit.
Significant Figures
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5400.145 cm Decimal Present – Pacific side
Start counting at 1st nonzero # cm 7 sig figs
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0.0175 g Decimal Present – Pacific side
Start counting at 1st nonzero # g 3 sig figs
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4855 g Decimal Absent – Atlantic side Start counting at 1st nonzero #
4 sig figs
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4000 mm Decimal Absent – Atlantic side Start counting at 1st nonzero #
1 sig fig
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Significant Figures & Addition and Subtraction
Answer has same number of decimal places as the addend with the least number of decimal places. Significant Figures & Addition and Subtraction
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77.2 cm is correct! cm cm 25.68 cm But what do you report? + cm
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Significant Figures & Multiplication & Division
Answer has same number of significant figures as the factor with the least number of significant figures. Significant Figures & Multiplication & Division
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78 m2 is correct! 24 m X 3.26 m = m2 But what do you report?
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