11/19/2023 0 Comments Age of water masses![]() ![]() This concept is known as Archimedes’ Principle, and it explains why objects sink or float. The buoyant force of the water is equal to the weight of the water displaced. He observed that the volume of water pushed out of a tub, or displaced, by an object was equal to the volume of the object. In the third century B.C., the Greek philosopher Archimedes was the first to describe buoyancy. The buoyant force (B) of water pushes up. The force due to gravity is greater on objects that are more massive, or weigh more. The gravitational force on an object is also called weight. 2.5, the gravitational force (G) is proportional to the mass of the red block. The gravitational force (G) of the earth pulls downward and is proportional to the mass of an object. Vertical-up-and-down-movement of water masses in the ocean can be explained in terms of two forces. The motion of any object is due to forces, which are pushes or pulls. When comparing two samples of water with the same salinity, or mass, the water sample with the higher temperature will have a greater volume, and it will therefore be less dense. The warmer the water, the more space it takes up, and the lower its density. This is represented by the increase in the size of the box from Fig. When the water is heated, it expands, increasing in volume. When the same amount of water is heated or cooled, its density changes. The density of water can also be affected by temperature. When comparing two samples of water with the same volume, the water sample with higher salinity will have greater mass, and it will therefore be more dense. The more salt there is dissolved in the water, the greater its salinity. Salinity describes how much salt is dissolved in a sample of water. This is represented by the addition of red spheres and blue cubes to the box from Fig. When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases. Adding additional matter to the same volume also increases density, even if the matter added is a different type of matter (Fig. If volume increases without an increase in mass, then the density decreases (Fig. If the amount of matter is increased without changing the volume, then the density increases (Fig. ![]()
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