Why is the water in constant motion calm down, the water level is always parallel to the horizon

Because pure water is uniform, and water has fluidity (the water that occupies the space naturally has a supporting force), under the action of gravity, the lowest point is first filled in the process from movement to rest, so under the combined action of gravity and the supporting force of water, the water continues to flow to the lowest point until there is no lowest point on the water surface, (shaking water can also be regarded as an artificial low point, so the water will flow, Under the combined action of gravity and the support force of water, fill in the low point) At this time, the horizontal plane is parallel to the surface (because gravity is always perpendicular to the surface) The area is larger, and the water surface is spherical, which should be the surface is spherical, for example: sea surface; If the area is small, it is approximate to be a plane: this is the principle why the horizontal plane is always parallel to the horizon after the water is in constant motion and calms down (because gravity is always perpendicular to the surface).

In addition, under normal conditions, no matter how the water moves, as long as it is still (relatively stationary, because the water is diffuse, so the water does not completely stand still), it is parallel to the ground.

Of course, it's the gravitational pull of the earth, because of the gravitational pull of the earth, everything can stay on the ground honestly, plus the fluidity of the water is good, so no matter how you shake it, it will be parallel to the horizon when you are still.

Because of gravity and gravity. Some of them are just what I understand but don't know how to express them, but you need to use simulation experiments or conversion methods to find the answer to this question!

Water has no brains and doesn't turn.

Because there is gravity pulling the water.

Meanwhile. The water has tension to make the surface of the water flat.

The horizon will be parallel to the horizon ((don't blame me @[email protected] for the misnomer

Question: How does a drop of water drop into a basin of calm water produce water waves from the inside out??? This is a mechanical wave where the points do not move with the wave, i.e. the water molecules just vibrate up and down, and they are dampened vibrations.

Reference: This question is related to gravity and chemical and physical structure. The three states of water: liquid (seawater), solid (iceberg) and gaseous (invisible liquid and delicate water vapor). The clouds in the picture are water droplets that gather in the atmosphere.

Because pure water is uniform, and water has fluidity (the water that occupies the space naturally has a supporting force), under the action of gravity, the lowest point is first filled in the process from movement to rest, so under the combined action of gravity and the supporting force of water, the water continues to flow to the lowest point until there is no lowest point on the water surface, (shaking water can also be regarded as an artificial low point, so the water will flow, In the joint action of gravity and the supporting force of water to fill the low point) at this time the horizontal plane is parallel to the surface of the earth (because gravity is always perpendicular to the surface of the earth) the area is large and the water surface is spherical, it should be the surface is spherical, for example: the sea surface, the area is small is approximate to the plane: the above is why the water is constantly moving and calming down, the horizontal plane is always parallel to the horizon (because gravity is always perpendicular to the surface).

In addition, under normal conditions, no matter how the water moves, as long as it is still and vertically (relatively stationary, because the water has diffusion properties, so the water will not be completely stationary), it will be parallel to the ground.

Reference: baidu

The water surface is not perpendicular to the ground but parallel to the horizontal plane because the water is subjected to gravity and the water is liquid.

Please refer to the concept of water level, 1A plane formed by water that is relatively completely still also refers to a plane parallel to this plane.

2 (biological, medical) horizontal plane (also known as transverse plane), perpendicular to the vertical axis, divides the human body into two parts: upper and lower.

3. Reference planes and coordinate planes when conducting scientific research or observation.

4. A plane in mathematics composed entirely of horizontal parallel straight lines.

5. The plane parallel to the h-plane in mechanical drawing.

6. The plane tangent to the water level in surveying.

a,c set two equal forces on the left and right, the ball goes to the left, when the left force is removed, then the force to the right is opposite to the direction of motion. The ball speed decreases, so the kinetic energy decreases. In the same way, if the force to the right is removed, the ball speed increases and the kinetic energy increases.

B is not right reason: the ball is subjected to external force that is not zero, it must be the work done on the ball. Then the gravitational potential energy of the ball and other energies remain unchanged, it must be that the kinetic energy changes.

d.Not for the right reason. If A, it is to do negative work.