What does it mean when space is a vacuum?
space where there is no pressure.
A perfect vacuum can only be achieved by completely eliminating atmospheric pressure, which is challenging because there aren't many atoms or molecules in real space.
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When space is a vacuum, it means that it is devoid of matter and air. It has extremely low pressure and density, with no particles or molecules present.
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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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