Question

Water has a density of ~ 1 gr/cm3 ~ 1000 kg/m3. Estimate the mass of Earth’s oceans (in kg).

a) 1.35 x 10^21 kg
b) 1.50 x 10^21 kg
c) 1.75 x 10^21 kg
d) 2.00 x 10^21 kg

Answer 1

The mass of Earth's oceans can be calculated by multiplying the density of water (1000 kg/m³) with the estimated volume of the oceans (1.5 × 10¹⁸ m³), resulting in approximately 1.5 × 10²¹ kg.

Step-by-step explanation:

The question involves estimating the mass of Earth's oceans, which requires a basic understanding of density and volume. Density of water is given as 1 g/cm³, which is equivalent to 1000 kg/m³. The volume of Earth's oceans is estimated to be 1.5 × 10¹⁸ m³. To find the mass, we can use the formula (M = ρわ), where M is mass, ρ (rho) is density, and V is volume. Using the given density of water and the volume of Earth's oceans, we calculate the mass as (1000 kg/m³)(1.5 × 10¹⁸ m³), giving us a mass which is around 1.5 × 10²¹ kg.