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Cards In This Set
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State the SI fundamental units
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1) Time: second: s2) Length: meter: m3) Mass: kilogram: kg4) Temperature: kelvin: k5) amount of substances: mole: mol6) light intensity: candela: cd7) Current: Ampere: A
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State units in the accepted SI format
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Ms-1
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State the largest and smallest magnitude of things for Mass
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Mass of electron = 10-30mass of the universe = 1052
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State the largest and smallest magnitude of things for length
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Radius of the universe: 1026diameter of the proton: 10-15
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State the largest and smallest magnitude of things for time
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Age of the universe: 1019passage of light across nucleus: 10-23
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Examples of Systematic errors
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1) poorly made instrument2) poorly calibrated instrument3) zero error4) poorly timed (start/ end)5) parallax error
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Examples of Random errors
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1) wrong data used2) wrong equation3) wrong theory4) wrong calculation5) misreading scales
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Distinguish Accuracy and Precision
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Accuracy : how close a measurement is to the accepte valuePrecision: indicated by the agreement among number of measurement
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Two ways to reduce random errors
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1) use more sensitive equipment2)taking more measurements and use average data
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Requirements for a line to be linear
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1) best fit line is a straight line 2) best fit line passes through (0,0)
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What does "directly proportional" mean?
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Linear relationship
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What is the definition of best fit line?
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The line going through each error bar. The line can be curved or straight.
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What to do when the equation contains exponents?
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Use logarithms
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What two parts make up all measurements and quantities ?
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1) the number2) the units
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What are derived units?
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The combinations of fundamental units
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