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Cards In This Set
| Front | Back |
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Error=
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Experimental value-accepted value
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Percent error=
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|error|/accepted value X100
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Accuracy
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Measure of how close a measurement comes to the actual or true value of whatever is measured
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Precision
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Measure of how close a series of measurements are to one another
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How many sigfigs?
0.00073 |
2
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How many sigfigs?
8765 |
4
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How many sigfigs
0.05730 |
4
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Length, mass, temp., time, amount of substance, luminous intensity, electric current
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Meter, kilogram, kelvin, seconds, moles, candela, ampere
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Mega, kilo, deci, centi, milli, micro, nano, pico
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1 million x, 1000 x, 10 times, 100 times, 1000 times, 10 million times, 1000 million times, 1 trillion times
x-larger, times-smaller |
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Density=
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Mass/volume <3
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Kelvin=
Celsius= |
C+273k-273
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As the temperature increases, the density of most substances
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Decrease
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1J=1 cal=
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0.2390 cal4.184 J
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Democritus' atomic phiosophy
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Believed atoms were indivisible and indestructible
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Dalton's atomic theory
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1.all elements are composed of tiny indivisible particles called atoms2.all atoms of the same element are identical. the atoms of any one element are different from those of any other element.3.atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form compounds4.chemical reactions occur when atoms are separated, joined, or rearranged. atoms of one element, however, are never changed into atoms of another element as a result of a chemical reaction.
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