The lightest tree is balsa. The mass of the wood of this tree is 12 g with a volume of 100 cm3. Determine the density of the wood.

First, let’s remember the formula for calculating density:
p = m \ V
Find the density of wood in grams per cubic centimeter:
p = 12g \ 100cm ^ 3 = 0.12g \ cm ^ 3
Let’s find the density of wood in kilograms per cubic meter:
p = 12g \ 100 cm ^ 3 = 12 g \ cm ^ 3 = 120 kg \ m ^ 3
Answer: p (wood density) = 0.12 g \ cm ^ 3, or 120 kg \ m ^ 3