Testing Materials

Choosing materials for a building

What properties would it be useful to know about the building materials?

Density, Mass and Volume

Density

Density is the unit mass per unit volume.

Its units are kgm-3 or kg/m3

Which is heavier?

Which is more dense?

Working Out Volumes

Volumes of common objects:• Cube – L3

• Cylinder – Lπr2

• Sphere – 4/3πr3

You are going to conduct a practical

Using the micrometers and mass balances available, you will:• Determine the volume and mass of the ball bearings

• Plot these results onto a scatter graph

• Find the line of best fit

• Work out a gradient

Plotting the graph

• Mass on y-axis

• Volume on x-axis

• Fill as much of the paper as possible

• I am looking for neatness and accuracy

• Don’t overstate your precision when taking readings!