Calculating Density 3
Use your computer for a calculator. Need help understanding the Math?
Do this exercise.
3) A 10 g object displaces 20 mL. Calculate the object's density.
What is 10 g?
- m (mass)
- F (force)
- v (volume)
- S (speed)
- t (time)
- D (density)
- a (acceleration)
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
What is 20 mL?
- m (mass)
- F (force)
- v (volume)
- S (speed)
- t (time)
- D (density)
- a (acceleration)
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
What is your unknown?
- m (mass)
- F (force)
- v (volume)
- S (speed)
- t (time)
- D (density)
- a (acceleration)
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
D = ? (your unknown)
What equation will you use?
- D = m/v
- Q = (m)(ΔT)(Cp)
- S = D/T
- a = (Δv)/(Δt)
- p = mv
- F = ma
- W = Fd
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
D = ? (your unknown)
Equation: D = m/v
Which of the following is correct?
- D = 10/20
- 20 = 10/v
- D = 20/10
- 10 = m/20
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
D = ? (your unknown)
Equation: D = m/v
D = 10/20
What does "10/20" mean?
- 10 x 20
- 10 ÷ 20
- 20 ÷ 10
- 20 x 10
- 20 - 10
- 10 + 20
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
D = ? (your unknown)
Equation: D = m/v
D = 10/20
So, D = __ (no units, yet)
- 0.5
- 1
- 2
- 4
- 1/2
- 10
3) A 10 g object displaces 20 mL. Calculate the object's density.
m = 10 g
v = 20 mL
D = ? (your unknown)
Equation: D = m/v
D = 10/20
So, D = 0.5 __
What are the units for Density?
- g/mL
- gmL
- densities
- kilograms/liter
- atomic mass units