Transcript Wednesday, September 5

Mass, Weight, and Density
Density is mass per unit of volume.
M
D = ------V
Volume
For a rectangular solid:
V = LWH
For a cylinder:
V=
2
πr h
For an irregular solid:
???
Volume
How are we going to find the
volume of an irregular solid?
Volume
Volume
Lab # 2
Using Density to Find
the Thickness of a Wire
Lab # 2
Part 1:
Find the density of copper.
M
D = ------V
Lab # 2
Part 2:
Using the density, find the
volume of a sample of copper
wire.
M
V = ------D
Homework
• Read ChemLab 2 (pp 46-47)
• Answer the Pre-Lab questions
Today:
• Collect raw data
• Graph mass vs. volume
Tomorrow:
• Do the math
• Answer discussion questions 3 and 6