Preparing for the test

• Science
• Middelbare school
• havo
• Leerjaar 2

This lesson:

• Recap
  
• Practicing for the test
  

Recap

What is density?

Density is

• The ratio between mass and volume of an object or a substance.
  
• A property of a substnace.

Density=​volume​​mass​​

Density=​volume​​mass​​

ρ=​v​​m​​

ρ: density – g/cm3, kg/m3

m: massa – g, kg

v: volume – cm3, m3

Density exercise

Exercise 1) A rectangular block of copper has a mass of 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper?

Exercise 2) A block of ice has a volume of 980 cm³. The density of ice is 0.917 g/cm³. Calculate the mass of this block of ice.

What makes objects 

float or sink?

Link

Objects float on a liquid if they are less dense then that liquid

Objects sink into a liquid if they are denser then that liquid 

Test week material

• 8.1 Pressure
  
• 8.2 The effects of pressure
  
• 8.3 Pressure in liquids
  
• 8.4 Using pressure in liquids 
  
• 8.5 Pressure in gases
  
• 8.6 Pressure, volume, and temperature in gases
  
• 8.8 Density
  
• 8.9 Explaining density
  

P​1​​=P​2​​

​A​1​​​​F​1​​​​=​A​2​​​​F​2​​​​

F​1​​⋅A​2​​=A​1​​⋅F​2​​

Converting units

Converting m² to cm²

Converting N/m² to n/cm²