Is seawater flat? Or is it arc shaped?? Why is seawater arc shaped

The sea water is flat on a small scale. The so-called "horizontal as a mirror". It's like the earth is flat on a small scale.

But on a large scale, the sea surface is arc-shaped and part of a circle. This is also the reason why when looking at distant ships on the surface of the sea, you can see the mast first, and then the hull.

As for why the sea surface is curved? Simply put, it is because the sea surface is also part of the earth's surface. The Earth is an almost perfect sphere, and as part of the Earth's surface, the surface of the sea is, of course, also curved.

To complicate it a little more, seawater is a liquid, and a liquid is a type of fluid that has a tendency to be as close to the center of gravity as possible under the gravitational pull of the earth to maintain the minimum gravitational potential energy of the fluid.

This state is called ".Hydrostatic equilibrium state”。For fluids, this state can only be spherical.

So, the sea is curved.

The sea level changes with the movement of the earth and is solitary, the moon and the sun have an effect on the sea level, and the sea surface that is closer to the moon or sun will bulge upwards due to their gravitational pull.

The sea is arc-shaped because the earth is round, and the sea level is naturally arc-shaped.

Because the earth is round, the sea water rotates with the earth, showing an arc, and then there is a gravitational influence of the moon, and the rivers, lakes and seas on the earth will produce tidal phenomena.

What the eye sees is flat, and roughly arc-shaped, because the earth is round and arc-shaped.

You may visually think it's flat, but it's actually curved, because the earth is an oval, and the lake is naturally curved.

The Earth is approximately a sphere, and the sea level is, of course, a sphere, but because of the large diameter of the Earth, a part of its arc can be approximated as a straight line.

The Earth is approximately a sphere.

The sea level is, of course, the spherical surface.

Arc-shaped because its surface is parallel to the Earth.

Affected by rotation and the gravitational pull of the moon, the sea level is low in the east and high in the west.

Example: There is a drop in the Panama Canal.

Arc, what shape is the earth? Approximate circle.

Circle is the most stable state, so the earth will remain nearly round, so the sea will be arc-shaped.

The earth is round, but it seems that the horizon is straight, and the horizon is straight, which is not a macro concept!

It's hard to level a bowl of water, let alone the sea

Because every atom in the water molecule is round, hehe, when I talk nonsense.

Upstairs, you're wrong, the earth isn't round, and you'll be deducted n points.

The role of gravitational force. This is what Uncle Newton told me at night, and it should be right.

Mainly because the earth is round.

Seawater also has a certain curvature, but when you compare seawater with the earth, you don't analyze the two at the same level, when you talk about the earth, you see the whole earth, and when you talk about seawater, you just take it out and talk about it separately. You're only partially observing, so there's a certain curvature when you're looking at it from a distance, and it's horizontal when you're looking at it up close. For example, if you look at a curve as a whole, it's curved, and when you look at a small part of the curve, you might be looking at a short straight line, and that's how the earth and the sea relate.

Regarding tides, the rise and fall of the sea during the day is called the tide, and the rise and fall of the sea at night is called the tide. There is a record in the ancient books of our country that "the water of the sea, the morning is the tide, and the evening is the tide". The gravitational force includes celestial bodies such as the moon and the sun, especially the moon, and at the same time, the action of this force changes periodically as the relative positions of the earth, the moon, and the sun change.

The gravitational force of the moon and the centrifugal force of the earth are two opposing forces, and the resultant force (vector sum) produced by the combination of the two is the force of the moon to cause tidal phenomena in seawater, which is called "lunar gravitational force". The mass of the Sun is about 27 million times that of the Moon, and the average distance from the Sun to the Earth is about 389 times the average distance from the Moon to the Earth. Therefore, it can be deduced that the ratio of the gravitational force of the Sun to the gravitational force of the Moon is that the tidal phenomenon caused by it is not easy to observe alone, but it affects the magnitude of the lunar tide.

On the first or fifteenth day of the lunar calendar, the position of the earth, the moon and the sun is almost in the same straight line, and the gravitational force of the moon and the sun is the same. But at the beginning of the lunar calendar.

Seven, eight (winding) or twenty.

On the second and third (lower chord), the gravitational force of the Moon on the Earth and the gravitational force of the Sun on the Earth are perpendicular to each other, and the gravitational force of the Sun weakens the gravitational force of the Moon, so that there is a small tide in the seawater. In fact, the tides tend to occur after synodic times.

In the second and third days, most of the small tides appear after the upper and lower chords.

2. 3 days, the reason is that the seawater is affected by its own viscosity and seabed topography in the process of flow.

Because we don't have enough vision, when you look up at the sky, you will find that the sky is the same as the lid of the pot, which means that the earth is round. Mainly because we are so small and the earth is so big. As long as you are high enough to ** the earth, you will find that the earth is round, and, on the ocean, you look at the sky, you will find that the sea water is an arc, which also means that the earth is round, which is like the sun is n times larger than the earth, but why do we see the sun is so big.

The truth is pretty much the same! It's still a matter of perspective!

The ocean is not flat in the first place ...

Go and see the sea, child, and you will find that the horizon is not a standard straight line...

The reason why you feel flat is because your field of vision is small.

Or it's easier to understand by buying a globe and coming back.

The method without any high-tech tools: during an annular lunar eclipse, the shadow part of the Earth on the Moon is round. Looking at the horizon from the seashore is an arc of Zheng Zheng hail.

When watching a ship approaching from a distance, you always see the top of the boat first, and the opposite is true when the boat goes into the distance. If you go in one direction, you will always return to the beginning. Climb high and look far away.

If the earth is flat and there is nothing in the way, then it should be the same far no matter how high you look, but in fact, no matter where you are on the earth, you will be looking far away. So the earth is round, and the projection of the earth on the surface of the moon during a lunar eclipse is not always formed in a fixed place on the earth that shouts sails. But it is round at all times, so the surface of the earth should be round In 1519 In 1522, at the behest of the Kingdom of Spain, the fleet led by Magellan crossed the Atlantic, Pacific and Indian Oceans, returned to Europe, and completed a circumnavigation of the world

The unevenness of the sea is caused by the gravitational pull of the sun and the moon, and because there is wind, there are waves. Otherwise, how could there be a Chinese proverb and idiom that "there is no wind and three feet of waves".

The first time people said that the earth is round, that is, when they look at the sea from a distance, the surface of the sea is round.

Shooting with a wide-angle lens, it causes distortion. It's like looking in a mirror, it's a shooting technique, not because the sea level has really become arc-shaped.

The shape of China's eastern coastal waters is generally arc-shaped, with the East China Sea being the most typical. As can be seen from the map, the periphery of China's eastern and southern seas is the famous western Pacific island arc chain (Kuril Islands - Japanese archipelago--- Okinawa Islands--- Taiwan Islands--- Philippine Islands --- Malay Archipelago), and most of the two sides of the island arc chain have trenches corresponding to archipelago and continent, and the direction of the trench is basically consistent with the coastline of the archipelago and the mainland, which can roughly prove the main reason for its formation (that is, the shape of China's eastern coastal sea area is generally the main reason for the arc, and the East China Sea is the most intuitive, China's continental shelf basically extends to the west side of the Okinawa Trench) is the role of plate tectonics theory. Geologically, trenches are thought to be the result of the interaction between oceanic and continental plates, and all trenches are associated with the Pacific Rim, such as the Pacific Rim zone, which occurs near the trench.

It's very simple, God didn't make it man-made, you see Dubai's beaches are regular arcs.

The platinum version should be similar to 2012, in 2012, to build shops (the first in the service industry) in all the places where there are residents, to be mixed in with residential buildings, or around, when you click on the shops, if all the residential buildings are green, generally about 45 buildings to build a store (not so strict) 4 In addition, there must be enough agriculture in the city to ensure the operation of the shops628

The movement of continental plates, much later, will not be arc-shaped.

There is no source Li Shi's scum, and the rules of nature are cracked and quiet.