Density Archimedes Archimedes and the Golden Crown Density

Density • Density is how compact matter is. • More mass shoved into a

Density Considers Two Things • How much mass is present. • How much volume

1. What does Figure A illustrate about the density of the two metals? Explain.

A A 2. What does Figure B illustrate about the density of the two

A A 3. If the cube of aluminum in figure B were cut into

A A 4. Metals expand when heated. If the gold cube in part B

Does it Float? • If something floats or rises it is less dense than

Density • Density is the mass per unit volume. – How much mass there

Density • Density is the mass per unit volume. • Density = Mass ÷

Density • Density is the mass per unit volume. • D = Mass ÷

Mass = 2680 g Volume = 1450 cm 3 Illegal ivory is often detected

Mass = 2680 g Volume = 1450 cm 3 D=M÷V = 2680 g ÷

Calcium chloride is used as a deicer on roads in winter. Its density is

The density of methanol is 0. 788 g/cm 3. What is the minimum volume

Homework • Worksheet: Chapter 2 -3 • Study Guide Chapters 1 & 2 due

Slides: 32

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Density

Archimedes

Archimedes and the Golden Crown

Density • Density is how compact matter is. • More mass shoved into a certain amount of space makes something more dense.

Density Considers Two Things • How much mass is present. • How much volume does it take up. • Make sure to consider both these factors when discussing density.

A A

1. What does Figure A illustrate about the density of the two metals? Explain. A A

A A 2. What does Figure B illustrate about the density of the two metals? Explain.

A A 3. If the cube of aluminum in figure B were cut into four equal parts. How would the density of one part compare to the whole cube?

A A 4. Metals expand when heated. If the gold cube in part B is heated, what will happen to its density?

Does it Float? • If something floats or rises it is less dense than the material it is floating/rising in. • Objects of greater density will sink.

Density • Density is the mass per unit volume. – How much mass there is in a certain amount of space.

Density • Density is the mass per unit volume. • Density = Mass ÷ Volume

Density • Density is the mass per unit volume. • D = Mass ÷ Volume ÷

Solving For Variables

Common Volume Units

Mass = 2680 g Volume = 1450 cm 3 Illegal ivory is often detected on the basis of density. What is the density of the elephant tusk?

Mass = 2680 g Volume = 1450 cm 3 D=M÷V = 2680 g ÷ 1450 cm 3 = 1. 8482 g/cm 3 = 1. 85 g/cm 3 Illegal ivory is often detected on the basis of density. What is the density of the elephant tusk?

Calcium chloride is used as a deicer on roads in winter. Its density is 2. 50 g/cm 3. What mass of calcium chloride will the truck hold if its volume is 4560 L?

Calcium chloride is used as a deicer on roads in winter. Its density is 2. 50 g/cm 3. What mass of calcium chloride will the truck hold if its volume is 4560 L? 4560 L = 4, 560, 000 cm 3

Calcium chloride is used as a deicer on roads in winter. Its density is 2. 50 g/cm 3. What mass of calcium chloride will the truck hold if its volume is 4560 L? 4560 L = 4, 560, 000 cm 3 M=Dx. V = 2. 50 g/cm 3 x 4, 560, 000 cm 3 = 11, 400, 000 g

The density of methanol is 0. 788 g/cm 3. What is the minimum volume of a tank that can hold 795 kg of methanol.

The density of methanol is 0. 788 g/cm 3. What is the minimum volume of a tank that can hold 795 kg of methanol. 795 kg = 795, 000 g

The density of methanol is 0. 788 g/cm 3. What is the minimum volume of a tank that can hold 795 kg of methanol. 795 kg = 795, 000 g V=M÷D = 795, 000 g ÷ 0. 788 g/cm 3 = 1, 008, 883 cm 3 = 1, 010, 000 cm 3 How many liters is this?

The density of methanol is 0. 788 g/cm 3. What is the minimum volume of a tank that can hold 795 kg of methanol. 1, 010, 000 cm 3 ÷ 1000 cm 3/L = 1010 L

Homework • Worksheet: Chapter 2 -3 • Study Guide Chapters 1 & 2 due Monday