Hobbies And Interests
Tides
Newton's "Principia" was published in 1687. In it, he proposed his three laws of motion. He also stated his theory of gravitational pull. Using these laws, he explained mathematically the forces in nature and the solar system. He explained that the pull of the sun and moon on Earth's oceans causes the movement of tides. Earth's gravitational and rotational motion forces the ocean waters to move.
Coriolis and Currents
Gaspard Gustave de Coriolis was a physicist who looked at Newton's laws of motion in rotating systems. His theory is called the Coriolis effect. Since Earth is a sphere and rotates, air deflects rather than following a straight line. It moves toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths. The global wind system is a force moving the surface ocean currents on the open sea. The strength of the currents is dependent on the strength of the force of the winds.
Third Law and Cephalods
Octopuses, squid and nautiluses are examples of marine mollusks. They have an organ called a siphon that allows them to shoot water to propel themselves. The siphon fills with water and can be stored there until the animal wants to move. It shoots the water out of itself and the force sends the animal in motion through the sea. This propulsion system is an example of an action producing a reaction. The water moves in one direction, and the mollusk moves in another direction.
Third Law and Fish
Fish also exemplify the laws of motion as an action and reaction pairing with the ocean. In the ocean, fish move with the current of the water as objects having force exerted on them. Fish can use their fins to move in the ocean over and above how the currents take them. The force of the water combined with the force of the fish in motion enable it to move.