Unit Conversions!

 

-Unit conversions is all about the converting from a form of unit to another, for example, convert 100 Centimetre to metres, or it could be convert 1 centimetres to kilometres.

-measurements can be answered in different forms for different purposes but in the end, it is the same measurement

Quantities

- Many of the measurements that we do, normally it has 2 things: the number and the unit, when we combine it together it is called quantities

SI Units

-we use this system to help us convert units into different forms, SI stands for systeme Internationale and it was derived from France

-it was using powers of ten to determine the unit
Measurement                                          Unit                                                   Abbrev.
length                                                   metre                                                         m
time                                                     second                                                       s

mass                                                    gram                                                          g

amount of substance                             mole                                                          mol.
luminous intensity                                 candela                                                      col
temperature                                         Kelvin                                                        K
electric current                                     Ampere                                                     A


Conversions
-Refer to SI Prefixes and Conversion factors to guide us to find the answer

-One note to help you, it is to always remember a given value with a variable x, and when you multiple the conversion factor, the variable x must be the denominator so then you can cross the "like" factors

For ex./ Convert 8 cm to m
8 cm X 1m/ 100cm, so then the cm is crossed out because it is the same variable.
the answer is 0.08 m or 5 X 10 to the power of -2.

For more info, go to this youtube video, it might help you better to understand the Unit Conversions and hot to do them:

http://www.youtube.com/watch?v=ppaCtBbwISo&feature=relatedent

P.S. You will have to memorize this chart!

BUT.... You only have to remember all of the except...yotta, zetta, exa, peta, yocto, zepto, atto, ferto. So that's not a lot to memorize!



YAY!!!!

This entry is by Stephanie Tsui!