Galloway-PHYS 1310 Chapter 12: Solids and Density Concepts, Study notes of Physics

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Galloway-PHYS 1310 Chapter 12

Chapter 12: Solids

Galloway-PHYS 1310 Chapter 12

Density

• Density (mass/volume) independent of size or shape of object.
• How to measure your density?

Mass
Volume

Galloway-PHYS 1310 Chapter 12

Specific Gravity

• Density of object divided by density of water.
• Since density of water is 1 g/cc then this is the same number as giving density in 1 g/cc units.

Galloway-PHYS 1310 Chapter 12

Floating and Sinking

• Four cubes are put into a glass full of water.
• They have densities of 0.8 g/cc, 0.9 g/cc and 1.7 g/cc and 2.0 g/cc.
• Draw a picture of a beaker showing how the four cubes look when they are dropped into the water.

Galloway-PHYS 1310 Chapter 12

Scaling Activity

• Consider a cube of 1 cm x 1 cm x 1 cm. If it is scaled up by a factor of 100 on each side to 1 m x 1 m x 1 m and still made of the same material.
• By how much does the cubes volume, surface area, cross sectional area, mass, and density change by?

Galloway-PHYS 1310 Chapter 12

Heat Production

• Living organism…
• VE14-16(Scaling Cube), 15(Dust Explosion),
• VE8-7(2:1 Scaling), 8(Bologna Bottle)