Density & Graphing

What is Density?

• The Density of an object is it's mass divided by it's volume 

Ex.  d = m/v (density = mass in kg divided by volume in L)

• Is usually expressed in Kg/L, Kg/m^3, or g/cm^3

Ex.  135Kg/65L = 2.077 ~ 2.01
                           = 2.01 Kg/L

Well, what about Graphing...? 

Graphing is pretty straight forward but we need to remember 5 very important things when faced with the task of putting one together:

1. Label axis' 
2. Create an appropreate scale
3. Don't forget the title!
4. Plot the data points
5. And finally use a line of best fit

• Three things can be done when working with a graphs.  #1, reading the graph.  #2, finding the slope.  #3, Finding the best fit line. 

Here's a video that will give you a good idea of what graphing in physics 11 is all about :)  

What's good about that video is that it gives you information about how to find slope AND area.  But just to recap...

Slope = Rise / Run or Y2-Y1 / X2-X1
Area of a triangle =1/2 (bh)
Area of a rectangle = l x w