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Entries for February 2010

1.50 Significant Figures I - Finding the Significant Digits in a Number

When we write a number we identify certain digits as significant (meaningful or important) and other digits as not significant because they are simply placeholders for the decimal point.

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posted @ Monday, February 22, 2010 3:46 PM by Chemistry

1.51 Significant Figures II - Significant Figures in a X or ÷ Calculation

Significant Figures in a X or ÷ calculation. The rule for significant figures in a multiplication or
division calculation is simple. Find the number in the calculation with the LOWEST number of significant figures.

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posted @ Monday, February 22, 2010 3:54 PM by Chemistry

1.52 Significant Figures III - Significant Figures in a + or - Calculation

The rule for significant figures in an addition or subtraction calculation is a bit more complicated, because you ignore significant figures! Instead you look at how numbers line up with the decimal point.

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posted @ Monday, February 22, 2010 4:19 PM by Chemistry

1.53 Significant Figures IV - Significant Figures in Complicated Calculations

When there are several levels of calculations imbedded in parenthesis, you have to determine the significant figures within each parenthesis and work your way out to the final answer.

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posted @ Monday, February 22, 2010 4:26 PM by Chemistry

1.60 Dimensional Analysis I - Simple Unit Conversion

Learn more about simple unit conversion highlighting dimensional analysis.

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posted @ Monday, February 22, 2010 4:33 PM by Chemistry

1.61 Dimensional Analysis II - Unit Conversions Involving SI Unit Prefixes

Learn the steps how to convert units which include SI unit prefixes like identifying the starting and ending units and arranging the conversion factor in an equation.

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posted @ Monday, February 22, 2010 4:37 PM by Chemistry

1.62 Dimensional Analysis III - Unit Conversions with Two SI Prefixes

Go more in depth in dimensional analysis by learning how to convert units with two SI unit prefixes.

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posted @ Monday, February 22, 2010 4:40 PM by Chemistry

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