A steel casting with a volume of 25 dm3 has a weight of 150 kg. This casting is solid or complete.
| June 10, 2021 | education
If the steel casting under consideration is hollow, then the following inequality will hold: Vf> V and Vf> m / ρс.
Variables and constants: Vf – the actual volume of the considered steel casting (Vf = 25 dm3 = 0.025 m3); m is the mass of the casting (m = 150 kg); ρс – density of steel (ρс = 7800 kg / m3).
Let’s calculate: Vph> m / ρс.
0.025> 150/7800.
0.025> 0.01923 (correct).
Answer: The steel casting in question is hollow.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
