Converting units on a TI-89?

[GoldenBear]

Anyone know how to use the UNITS menu? Say for example, I wanted to do a simple conversion like 7 degrees F to Celcius. How would it be done?

 

[OS]

I want to know also. . .

 

[bastula]

I used to think you could convert temperatures by using the built-in units, but you can't. You have to use the tmpCnv() command.

Here is the syntax:
tmpCnv(expression_ºtempUnit1,_ºtempUnit2)

so to convert 7ºF to ºC, type in:
tmpCnv(7_ºf,_ºc)

which displays -13.8889_ºc

There you go!

 

[beer]

Enter a number, then hit the units menu and select the unit associated with that number. It may be N/cm^2, or something, it doesn't need to be just a single unit. Then use the arrow looking button, ->, that is next to the green shift key. It is the 2nd of the MODE key. Then enter the second unit you wish to convert to.

Example:

5_N/_cm^2 -> _lbf/_m^2

Output: 11240.4 _lbf/_m^2


<--- Loves his TI89

 

[bastula]

Elemental007 is right. But for temperatures, you have to use that command. Everything else can be done using the units menu - or you can also type it in. The feature is very handy, and has saved me several times on physics exams...

 

[Scrapster]

Great question GB.

I've always wondered that too.

 

[AmitPatel]

Unit conversion is so much easier on the TI-85/86.

 

[GoldenBear]

Oh yes, you guys are awesome Bastula and Elemental.

 

[ApacheXMD]

does no one read manuals anymore?

-patchy

 

[bastula]

<< does no one read manuals anymore? >>



That's the only way I found out how to do these conversions or to even use the thing.

 

[beer]

Same here. It's an obscenely complicated calculator. But at the same time it is so incredibly powerful that I am constantly learning new features, almost on a daily basis.