What two things does the engine of a quasar contain?
The engine of a quasar consists of a supermassive black hole and a ready supply of gas and dust.
Most galaxies have a supermassive black hole at their center, and when there is a ready supply of material nearby, it begins to fall into the black hole, forming an accretion disc. This is how quasars usually form in young galaxies.
Since material enters a black hole slowly, as more and more falls into the accretion disc, it becomes superheated by gravity and friction to the point where it releases enormous amounts of radiation.
A quasar's engine consists of two parts: material falling into the supermassive black hole and the black hole itself.
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An accretion disk and a supermassive black hole make up a quasar's engine.
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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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