Saturday, August 10, 2019

mass - Smallest Black hole nessesary to devour Earth?



While looking into black holes I can across the idea of hawking radiation, and the fact that microscopic black holes would near instantaneously evaporate before doing any damage. However larger black holes have a lower temperature, and so would last longer before evaporating.


What is the minimum mass a black hole have to have in order for the rate of mass inflow to outpace the evaporation rate of the black hole, if it spontaneously appeared in a terrestrial environment. Does it make a significant difference whether it magically appears in the atmosphere, at ground level, or at the core of the earth? Are there any other factors that would have a significant impact on the required mass?




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