units of measurments

1. volume

1.1. volume is Lxb

2. area

2.1. area is length x breath

3. temperature

3.1. use dataloggers to take the temperatures

3.2. find the density of the room(etc)

4. length

4.1. to find how long the item is

4.1.1. New node

4.2. there are some metre rules that can measure the accurate lenght of the item