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2 kwi 2016 · When you put something in water, gravity can pull the object down through the water only if an equal volume of water is allowed to go up against the force of gravity; this is called displacement. In effect gravity has to choose which it will pull down, the water or the immersed object.
Gravity ensures that water flows from higher to lower elevations, replenishing the Earth’s water sources and maintaining water availability. Without gravity, water sources would dry up, making it impossible for life to exist on Earth. 🌍
Any object that is in water has some buoyant force pushing up against gravity, which means that any object in water loses some weight. If the object displaces an amount of water equal to its own weight, the buoyant force acting on it will be equal to gravity—and the object will float.
The mean gravity field helps scientists better understand the structure of the solid Earth and learn about ocean circulation. Likewise, scientists use time-variable gravity to study ground water fluctuations, sea ice, sea level rise, deep ocean currents, ocean bottom pressure, and ocean heat flux.
On Earth, gravity pulls all objects "downward" toward the center of the planet. According to Sir Isaac Newton's Universal Law of Gravitation, the gravitational attraction between two bodies is stronger when the masses of the objects are greater and closer together. This rule applies to the Earth's gravitational field as well.
Why Study Gravity to Learn About Water? The force of gravity not only keeps us from floating away, it lets NASA study Earth’s water & ice from space. Using a pair of twin satellites named GRACE, we can monitor where our planet’s water is going, even when it is underground. Gravity is an attraction between two objects—such as a human and ...
Scientists are using novel measurements of gravity to gather indispensable information about Earth’s water supplies. The GRACE mission can see water flowing underground.
