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plz help, i'm horrible at conversions

- Thread starter bigman8424
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- #1

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plz help, i'm horrible at conversions

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What's the connection between time,speed and distance...?

Daniel.

Daniel.

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saltydog

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saltydog

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Oh yea, I didnt' forget: How far does light go in a nanometer:saltydog said:

The important thing to remember about conversions is to arrange the quotients so that the units cancel. That's the purpose of this exercise:

So we have:

[tex]\text{Speed of light: }\frac{186000\quad\text{miles}}{1\quad\text{second}}[/tex]

[tex]\text{feet in a mile:}\frac{5280\quad\text{feet}}{1\quad\text{mile}}[/tex]

[tex]\text{nanoseconds in a second:}\frac{10^9\quad\text{nanoseconds}}{1\quad\text{second}}[/tex]

So:

[tex]\frac{186000\quad\text{miles}}{1\quad\text{second}}*\frac{5280\quad\text{feet}}{1\quad\text{mile}}*\frac{1\quad\text{second}}{10^9\quad\text{nanoseconds}}[/tex]

Note how the units cancel leaving feet/nanosecond. It's about 1 foot. It's the same way with all the other conversion problems: Arrange the quotients so that the units cancel leaving you with what you want.

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