Determine the density of the pine if a pine block 1dm long, 5cm thick and 2cm high has a mass of 50g.

The density of pine can be calculated using the formula:

ρ = m / V, where ρ is the sought density of pine (kg / m³), m is the mass of a pine bar (m = 50 g = 0.05 kg), V is the volume of a pine bar (V = a * b * c, where a – the length of the pine bar (a = 1 dm = 0.1 m), b – the width of the pine bar (b = 5 cm = 0.05 m), c – the thickness of the pine bar (c = 2 cm = 0.02 m) ).

Let’s calculate the density of pine:

ρ = m / V = m / (a * b * c) = 0.05 / (0.1 * 0.05 * 0.02) = 500 kg / m³.

Answer: The density of pine is 500 kg / m³.