Density

Question 1

What is density?

Answer 1

• Measure of compactness

Question 2

Formula for density:

Answer 2

Density (kg/m^3) = mass (kg) / volume (m^3)

Question 3

What would happen if you compress a less dense material?

Answer 3

• Density stays the same

- Volume decreases

Question 4

How do you find the density of a solid object?

Answer 4

• Use balance to measure mass
• Put it in eureka can filled with water
• Water displaced will transfer to measuring cylinder
• Record volume
• Use formula

Question 5

How do you find the density of a liquid object?

Answer 5

• Measuring cylinder on balance and measure zero
• Pour 10ml into cylinder and record mass
• Pour another 10ml into cylinder and record total volume and mass
• Repeat till cylinder is full
• For each measurement, use formula
• Take average

Question 6

How can you tell from the density if an object will float or not?

Answer 6

• Lower than water, will float