Why are there tides? Detailed answer

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Why are there tides? Detailed answer

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Why are there tides?

The periodic rise of water in the oceans (high tide), and then a decrease in level (low tide) occur due to the attraction of the Moon and the Sun. The height of the tides depends on the relative position of the Earth and its satellite, the Moon, and solar attraction can slightly increase or decrease this height.

The difference in sea levels at high and low tide can range from a few centimeters in the Baltic Sea to 20 m in some bays of the Atlantic and Pacific Oceans. During the new moon and full moon, the height of the tides is especially high, in the first and last quarters of the moon it is noticeably less.

Attempts have been made and are being made to adapt this phenomenon for the generation of electricity (tidal hydroelectric power plants).

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

In what liquid can a coin float and a cork sink?

Such liquids are called ferromagnetic, or ferrofluids. They are a colloidal system based on a liquid (for example, water, kerosene or oil), in which the smallest particles of a solid ferromagnet (for example, iron or nickel) are “dissolved”.

The resulting dispersion medium "behaves" like a liquid with magnetic properties. By applying a vertically directed constant magnetic field to it, it is possible to change the magnitude of the buoyant (Archimedean) force acting on a body immersed in a ferrofluid.

If the vector of the magnetic field strength is directed downwards, then the magnetic force generated in this fluid will add up to the gravitational force (gravity) and the ferrofluid will behave as if its density has increased. As soon as the magnetic field strength reaches a sufficiently high value, the copper coin lying at the bottom of the vessel will float, as if it were in a liquid whose density is higher than that of copper.

If the magnetic field strength vector is directed upwards, then the magnetic force generated in the fluid will reduce the effect of gravity, and the ferrofluid will behave as if its density has decreased. When the magnetic field strength reaches a certain value, at which the magnetic force in the liquid almost becomes equal to the force of gravity (the ferrofluid becomes almost "weightless"), the cork floating on the surface will sink.

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