DensitySNC1D

What is Density?

Density is a quantitative PHYSICAL property of matter

What is Density?

Density is a quantitative PHYSICAL property of matter

It is the mass per unit volume:

V

mD

What is Density?

Density is a quantitative PHYSICAL property of matter

It is the mass per unit volume:

V

mD measured in g or kg

What is Density?

Density is a quantitative PHYSICAL property of matter

It is the mass per unit volume:

V

mD measured in g or kg

measured in mL or cm3 or m3

Which is heavier?Which is heavier: 1 kg of Feathers or 1 kg of Lead?

Which is heavier?Both weigh the same (1 kg) but the

feathers will take up a lot more space (volume) than the same mass of lead because the lead has a higher density.

Density of Some Common Substances

Substance Density (g/cm3)  

Air 0.0013                

Feathers 0.0025                

Wood(Oak) 0.6 - 0.9                

Ice  0.92                 

Water  1.00                 Bricks  1.84                

Aluminum  2.70                

Steel  7.80                

Silver  10.50                

Gold  19.30                 

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

?:

12.88)45.4)(45.4)(45.4(

0.1:3

DU

cmcmcmcmhwV

kgmG

Practice QuestionA cube of lead that has a mass of 1.0 kg is

4.45 cm on each side. What is the density of the cube?

33 11011.012.88

0.1:

:

3 cm

g

cm

kg orcm

kgDS

V

mDS

Irregular Volumes

The volume of an irregularly shaped object can be determined by measuring the volume of water it displaces.

Irregular Volumes

The volume of an irregularly shaped object can be determined by measuring the volume of water it displaces.

Of course, this only works if the object has a density higher than that of water. . . .

The Density Tower

Objects with a lower density will float on top of liquids with a higher density:

www.youtube.com/watch?v=-CDkJuo_LYs

Another Practice Question

Corn syrup has a density of 1.38 g/mL. What is the mass of the corn syrup in a 1.00 L container?

Another Practice Question

Corn syrup has a density of 1.38 g/mL. What is the mass of the corn syrup in a 1.00 L container?

Another Practice Question

Corn syrup has a density of 1.38 g/mL. What is the mass of the corn syrup in a 1.00 L container?

Another Practice Question

Corn syrup has a density of 1.38 g/mL. What is the mass of the corn syrup in a 1.00 L container?

Another Practice Question

Corn syrup has a density of 1.38 g/mL. What is the mass of the corn syrup in a 1.00 L container?

kgorgmLmS

VDmV

mDS

mU

mLLV

DG

mLg

mLg

38.11380100038.1:

:

?:

100000.1

38.1:

Rearranging

The equation for density can also be rearranged to solve for volume:

D

mV

D

m

D

VD

mVD

VV

mVD

V

mD