A. 1 g/cm³
B. 2 g/cm³
C. 1.5 g/cm³
D. none of these
🧠 Explanation:
The density of pure water at standard temperature and pressure (4°C, 1 atm) is exactly 1 gram per cubic centimeter. This value is often used as a reference point in physics, chemistry, and engineering. Density plays a key role in explaining buoyancy, hydrodynamics, and fluid mechanics. For example, objects with a density less than water will float, while denser objects sink. The unique density properties of water also support aquatic life and environmental balance.
