ABSTRACT
There are many, many occasions in our lives when we must make measurements on the numerous and varied systems that exist. For example, when you decide to buy a new carpet for your living room, you must measure the dimensions of the room so that you can know how much carpet to buy. When a cooking recipe calls for two cups of sugar, you must be able to make this measurement so that the cookies or pies you are making have the desired taste. When you buy an ice cream cone and it is guaranteed to have four ounces of ice cream, you would like the ice cream store clerk to have a scale so that you can be assured of having the promised amount. When you pump air into your bicycle tire, you measure the pressure so that you know if you have pumped in the correct amount.
