<span>The explanation for the quantum fluctuations which occured a few fraction of seconds after the bigbang could provide a better explanation of the origin of galaxies</span>
Answer:
The total mass of water in on Earth's surface is
.
Explanation:
Total planetary surface area = T = 
Total land area of planet = L = 
Total water area of planet = W
T = L + W


Volume = Area × Depth
Volume of water on earth = V
V= 


Total mass of total water on the earth = M
Density of the water,D = 1 g/mL = 0.001 kg/0.001 L=1 kg/L
1 g - 0.001 kg
1 mL = 0.001 L



The total mass of water in on Earth's surface is
.
Cairo is fan-shaped, narrowest in the south, where the river valley is wedged between desert escarpments, and widest in the north, where the valley blends into the delta. Over the centuries the city expanded westward, as a receding river channel left land flood-free. Lining the banks of the Nile River, Cairo is a fusion of ancient. Churches are built atop Roman ruins and skyscrapers rise behind medieval monuments. Egypt's capital is best known for preserving the last of the Seven Wonders of the Ancient World, but the city contains infinite treasures beyond the Pyramids of Giza.
Hope it helps
Please mark brainliest