If te earth did not turn how would the pattern of tides be affected
If the Earth did not rotate, the pattern of tides would be significantly affected. The rotation of the Earth plays a crucial role in the creation of tides, and without it, the tides would be quite different. Here's how:
1. Absence of Diurnal Tide: Currently, due to the Earth's rotation, we experience two high tides and two low tides each day, known as the diurnal tide. However, if the Earth didn't rotate, there would be no diurnal tide. Instead, there would only be a bulge of water on the side of the Earth facing the moon.
2. Lack of Semidiurnal Tide: The Earth's rotation also helps to create a second type of tide known as the semidiurnal tide, which is characterized by two unequal high tides and two unequal low tides each day. Without rotation, the semidiurnal tide would also be absent.
3. Fixed Tide Bulge: In the absence of rotation, the tide-generating force would cause water to bulge on the side of the Earth facing the moon continuously. This bulge would remain stationary with respect to the moon, rather than circulating around the Earth as it does now.
4. Changing Tidal Locations: With the Earth's rotation, different locations experience high and low tides at different times. Without rotation, the tide-generating force would still cause different locations to have different tides, but the timing and locations of these tides would be fixed relative to the moon's position in the sky.
In conclusion, the absence of Earth's rotation would result in a lack of diurnal and semidiurnal tides, a fixed bulge of water on the side facing the moon, and fixed tidal patterns relative to the moon's position. Tidal patterns would be very different from what we observe due to Earth's rotation.
If the Earth did not rotate, the pattern of tides would be significantly affected. Understanding the tides requires considering the interaction between the gravitational forces of the Moon and the Sun, and the rotating Earth.
Tides are primarily caused by the gravitational pull of the Moon and, to a lesser extent, the Sun. The Earth's rotation affects the timing and strength of the tides. As the Earth rotates, different parts of its surface experience the gravitational pull of the Moon, leading to high and low tides.
Without Earth's rotation, there would be a couple of major changes to the tide pattern:
1. The tidal bulge: Currently, the Earth's rotation causes the water on the side of the Earth closest to the Moon to bulge outwards, creating high tides. Simultaneously, on the opposite side, there is another bulge due to centrifugal force. If the Earth were not rotating, these bulges would remain fixed, resulting in two permanent high tides on Earth's surface.
2. Duration of a tidal cycle: A tidal cycle refers to the time between two consecutive high tides (or low tides). Currently, a lunar tidal cycle takes around 24 hours and 50 minutes, which is longer than a day due to the constant change in the Moon's position relative to the Earth. Without Earth's rotation, the duration of a tidal cycle would align more closely with a 24-hour day.
3. Lack of tidal variations: Currently, due to the rotation of the Earth, different coastal areas experience tides at different times. Without rotation, the timing of tides would become uniform worldwide. This means that there would be no tidal variations between regions, resulting in the absence of the daily ebb and flow of tides many coastal areas currently experience.
It's important to note that while these are the general effects of the Earth not rotating on tides, other factors like oceanic geography, underwater topography, and coastlines would still play a role in local tide patterns.
That depends on the orbit of the Moon, also on whether the Earth would not rotate at all, so that a day would last a year or, say, once per year.
The Moon and the Earth orbit around each other. Because the Earth is alot more massive than the Moon the center of mass of the Earth-Moon system around which both orbits orbit lies within the Earth itself.
The center of masses of the Earth and the Moon separately are in "free fall motion" around this common center of mass. Then because the Earth is a rigid body the whole Earth accelerates in the same way, which means that the surface of the Earth is not in free fall motion. This deviation from free fall motion gives rise to the tidal forces.
On the side of the Earth facing the Moon, the Moon is pulling harder than at the Earth's center which gives rise to a tidal force in the direction of the Moon.
On the side of the Earth facing away from the Moon, the Gravity of the Moon is weaker which then leads to a tidal force pointing away from the Moon.
This means that that both on the side of the Earth facing the moon and fcing away from the Moon, you get a tidal bulge. Then, if the Earth would not rotate, these two tidal bulges would move arond the Earth. So, you would have high tide twice a month.
Now, these tidal bulges experience friction so they will lag a bit behind the Moon. The friction force exerted by the Bulges on the Earth will lead to the Earth starting to rotate very slowly. Also, the tidal bulges lagging behind the Moon will cause the force of gravity exerted on the Moon to have a component in the tangential direction opposite to the Moon's velocity. So, the Moon would be slowed down in its orbit around the Earth which will cause it to slowly spiral inward.
But this means that in the distant past the Moon would have to be much farther away from the Earth and the Earth's would have to be rotating around its axis in the opposite direction as the Moon was revolving around the Earth, so that today the Earth's rotaton would be zero.
That's a very unnatural situation. It is more natural to have the Moon very far away from the Earth when the Earth is not rotating. In fact, that is expected to happen in the far future starting from the current situation. The Earth rotates aound its axis far faster than the Moon is rotating around the Earth (and in the same direction). So the tidal bulges are pushed a bit ahead of the Moon due to the friction exerted by the Earth on the bulges. The bulges then pull on the Moon making the Moon go around the Earth a bit faster. The Moon the slowly drifts away from the Earth. The bulges exert a friction force on the Earth, slowing it down.