Density

Question 1

Appreciate the difference between extrinsic and intrinsic properties

Answer 1

• Intrinsic value = independant of dimensions
• Extrinsic value = property changes with dimensions

Question 2

Explain why density is an intrinsic property

Answer 2

• The density of a substance remains the same whether the substance has a larger or lower amount
• E.g the density of water will remain the same for a glass of water and a litre

Question 3

Define density as:
Units:

Answer 3

𝜌 = 𝑚 / 𝑉
Measured in kilograms per cubic metre

Question 4

Use the density equation:

Answer 4

Rearrange it to have:
* mass = density x volume
* volume = mass / density

Question 5

Density of air, water and metals

Answer 5

Densities:
* Air: 1.204 kgm^-3
* Water: 997 kgm^-3
* Metals: mostly 2 - 20x10^3 kgm^-3