Why doesn't earth's moon spin on its axis?
The Earth's Moon does spin on its axis.
The Moon's rotation period coincides with the duration of the Moon's orbit around the Earth, a phenomenon known as tidally locking.
All Moons eventually become tidally locked to their parent planet due to tidal forces induced by Earth's gravity, which slowed the moon down until it was locked.
In actuality, tidal forces caused by the Moon's gravity are slowing the Earth's rotation, causing the day to lengthen and eventually tidally locking the Earth to the Moon, which will result in a month-long day with only half of the Earth being able to see the Moon.
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The Moon does spin on its axis, but it rotates at the same rate it orbits the Earth, causing one side of the Moon to always face Earth. This is called synchronous rotation, a result of tidal forces between the Earth and the Moon.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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