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chloe ko.
christina chow.
mr. doktor's chemistry class
block g

home. mrdoktor.

Density and Graphing

Density:
-the desity of an object is it's mass divided by it's volume.
D = m/v

Example:
Determine the density of a boulder that ahs a mass of 188kg and a volume of 52L.
D= 188kg / 94L
D= 2 kg/L

Graphing:

All graphs must contain 5 important things:
1. Labelled axis
2. Appropiate Scale
3. Title
4. Data points
5. Line of best fit

3 things can be done when working with graphs:
1) Read the graph
2) Find the slope
3) Find the area under the graph.

Example:
The data below represents the how long 6 students take to get school by walking in a day.

Students             Time [mins]    
  A                        5 mins
   B                        25 mins
   C                        60 mins
   D                        60 mins
   E                         40 mins
   F                         20 mins
  G                        0mins

          Slope: m = rise/slop
   1.  m= 12/3 =2 mins/ student
   2.  m= 0/0 =0 min/student
   3. m= 12/4= 3 mins/student



















Area: 1/2 (b)(h)
J= 1/2 (3)(12)
 = 18
K= lw = (2)(6)
  = 12
L= 1/2 (4)(12)
  =24

Area= 54mins/students

~Christina Chow :]