What is the average density per cubic meter used for calculating the density of water?

What is the average density per cubic meter used for calculating the density of water?

• A. 900 kg
• B. 1100 kg
• C. 1000 kg
• D. 1200 kg

Answer: (C)

Density is mass per unit volume, so for water we think about how much mass fits into a given volume. In SI units, one cubic meter of water has a mass of about 1000 kilograms, which is also expressed as 1000 kg/m^3. This value comes from water's density around 4°C, where it’s most dense, and is widely used as the standard reference (at typical conditions it’s very close, around 998–999 kg/m^3). That’s why 1000 kg per cubic meter is the correct choice. The other options would imply noticeably different masses for the same volume and don’t match water’s typical density.

Density is mass per unit volume, so for water we think about how much mass fits into a given volume. In SI units, one cubic meter of water has a mass of about 1000 kilograms, which is also expressed as 1000 kg/m^3. This value comes from water's density around 4°C, where it’s most dense, and is widely used as the standard reference (at typical conditions it’s very close, around 998–999 kg/m^3). That’s why 1000 kg per cubic meter is the correct choice. The other options would imply noticeably different masses for the same volume and don’t match water’s typical density.