2.4 Density _ 3

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 2

Planning

• Homework

• Revision previous lessons

• Explanation 2.4

• Let's work

Homework

Any questions?

You determine the mass with a ...

1. ruler
2. protractor
3. scale
4. measuring cilinder

How do you determine the Volume of an object?

What is the correct formula to calculate the density?

Explanation

Density

• Property ...

• Is a  quantity (variable) that expresses how much mass of a substance is present in a given volume.

• The mass (in grams) per 1 cm³ 

Explanation

Calculate the Density:

Explanation

Calculate the Density:

ρ=​V​​m​​

Explanation

Calculate the Density:

ρ=​V​​m​​

Variable	Symb.	Unit	Symb.
Density	(rho)	gram per cubic centimeter	g/
Mass	m	gram	g
Volume	V	cubic centimeter

ρ

cm​3​​

cm​3​​

Explanation

Calculate the Density:

ρ=​V​​m​​

The stone beside has a mass of 18 grams.
Calculate the density of this stone.

1. 0,5 g/cm^3
2. 2 g/cm^3
3. 9 g/cm^3
4. 18 g/cm^3

A block is 5 cm long, 5 cm wide, 4 cm high and weighs 270 grams.

What is the density of this block?
What material is this block made of?

Explanation

Calculate the Density:

But we are also able to calculate the mass or the Volume...

-> Rebuild this formula

ρ=​V​​m​​

Rewrite the following formula:

What is the correct formula to calculate the mass?

ρ=​V​​m​​

ρ=​V​​m​​

ρ=​V​​m​​

Rewrite the following formula:

What is the correct formula to calculate the volume?

ρ=​V​​m​​

ρ=​V​​m​​

ρ=​V​​m​​

Let's work

Now: 

- Read  §1.4 

- Finish §1.4 - exercise.: 1, 2, 4, 5, 6, 7