system
Given the following post, respond as if you're commenting on Reddit:
human
are black holes hot?

From my, extremely low level, understanding black holes suck in anything close enough at an alarming speed tearing everything to shreds. 

With that being said, would the amount of stuff being pulled in, and the rate at which it's pulled in, make the black hole hot? Or because it's in space it stays cold.

Also I don't know the right flair for this so sorry in advance if that's an issue.
gpt
The normal concept of temperature doesn't really apply to the black hole itself, as an object, since heat can never flow out of one by the usual mechanisms.  They do emit radiation, but the mechanism that produces it is completely different from normal thermal radiation.  

It's common to describe black holes as having an "effective temperature" based on the amount of radiation they emit, comparing it to how hot a normal object would have to be to emit the same amount.  It turns out that this effective temperature is determined by the black hole's mass, with more massive ones being colder.  All of the black holes known to exist are massive enough that their effective temperatures would be near absolute zero.

The accretion disks and jets of matter that surround black holes do have a temperature though, and they do get hotter because of friction and compression.  The matter in an accretion disk can reach temperatures in the millions of degrees.