All bodies at rest on a horizontal surface are equal to 9H. The volume of the body is 0.0012m2. Find the density of matter

Initial data: P (body weight at rest) = 9 N; V (volume of the body taken) = 0.0012 m3.

Reference data: g (acceleration due to gravity) ≈ 10 m / s2.

1) Calculate the mass of the body taken: m = P / g = 9/10 = 0.9 kg.

2) Let us find the density of the substance that makes up the body: ρ = m / V = 0.9 / 0.0012 = 750 kg / m3.

Answer: The density of the substance is 750 kg / m3.