gravitational settling मीनिंग इन हिंदी

Soap bubbles often start out with quite a bit more material; thickness decreases with time due to evaporation and gravitational settling of liquid to the bottom part of the bubble.
The heavy metals are believed to be in cloud layers in the atmosphere where the ions of each metal have a particular opacity that allows radiational levitation to balance gravitational settling.
The Arrow Ecology company has developed the ArrowBio process a patented system which takes trash directly from collection trucks and separates organic and inorganic materials through gravitational settling, screening, and hydro-mechanical shredding.