the probability that a surrounding atom will run into the mBH within 1 second is 1. It's like being an asteroid in a solar system where all the objects don't obey Newton's laws, but instead move around chaotically at 1015c (c =the speed of light).
I think there is a problem here, even particles undergoing fusion in the sun are no where near moving at a relativistic speed of 10
15c.
Referensing the correct Temerature to Motion fomula
found here
Where
kb = 6504*10
-023
T = 7000Kelvin
m = 9.4*10
-026 (mass of iron atom in kg)
Solves to
v~ = 69594.57
Vel = 120541.33 m/s
120541.33 m/s is a heck of a lot different from 299792458000000000000000 m/s (10
15c)
Conversley at the corrected average velosity, it all calulates out to take 746,115,342,900,001,000,000 years for a 1 iron atom massed BH to reach a problematic mass.