Class 4 (4th Engineer) SC&S 📅 Jan 2023

Exam Question

(a) Define Density, Relative Density (6)

(b) A bilge holding tank of 5 m length, 3 m width and 1.8 m depth has water of density 1.020 t/m3 upto a sounding of 1.3 m and oil of density 0.86 t/ m3 is floating on top of water upto an ullage of 0.3 m. Calculate the mass of water and oil in the tank. (10)

Reference Answer

### (a) Definitions
#### 1. Density (ρ)
Density is defined as the mass of a substance per unit volume. It is an intrinsic physical property that quantifies the concentration of matter within a substance.
- **Concept**: It measures how compactly the mass of a substance is contained within a given volume. A substance with a higher density has more mass packed into the same volume compared to a substance with lower density.

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