## How to: Conversions using the factor-label method (Wikipedia)

August 26, 2010

2

Brief instructions and example showing how to convert between units (say, from mi to m) using conversion ratios. Converting from one dimensional unit to another is often somewhat complex and being able to perform such conversions is an important skill to acquire. The factor-label method, also known as the unit-factor method or dimensional analysis, is a widely used approach for performing such conversions

## How to: Entering scientific notation on a calculator (TI)

August 26, 2010

0

Short 'how to' showing how to enter scientific notation on a TI (Texas Instruments) calculator. Use the Enter Exponent or [EE] key to enter numbers in scientific notation. The [EE] key is used to denote x10 for numbers written in scientific notation. Note: TI calculators use the EE button. Some calculators use the Exp button. If you don't know how to use these, you will waste your time and on some problems you'll get the wrong answer.

## Online tutorial: Scientific notation (UCel)

August 26, 2010

0

Online tutorial on using scientific notation to describe and compute with really large and really small numbers. Great review! 17 short Flash tutorials delivered in a charming British female voice. Good graphics and examples moving step-by-step through the use of scientific notation.

## Fact sheet: Using scientfic notation (Wikipedia)

August 26, 2010

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Well organized discussion of how to add, subtract, multiply, and divide using scientific notation, and how to convert between that and regular numbers. Note: calculators often use a different notation. The Wikipedia article has a nice little discussion showing how that works.

## Fact sheet: Number prefixes used in the SI system (Wikipedia)

August 26, 2010

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Well organized tables showing what the number prefixes—micro, nano, mega, giga, etc—mean and how to replace them with numbers. Note: gigabyte, megabyte, kilobyte, use a slightly different meaning for the prefixes. This can be a little confusing. The Wikipedia article has a nice little discussion of the difference between that and the SI usage.

## Fact sheet: Conversion factors for changing units (Wikipedia)

August 26, 2010

0

Well organized tables showing conversion factors for a lot of different units. For example, if you need to know * how many feet in one kilometer * how many Newtons are in one pound * how many cubic feet are in a cubic meter Look in the table for Length for the first, the table for Force for the second, and the table for Volume, for the third, and so on.