If You Had A Black Hole The Size Of A Nickel...
A black hole with the same diameter as a nickel would slightly beat out Earth's mass of around 13 x 10^24 lbs (6 x 10^24 kg). Assuming it appeared in your pocket or wallet, its pull would impact everything from the entire planet to, potentially, objects in the Asteroid Belt. Even a black hole with the mass (not the diameter) of a nickel would have far-reaching effects. Though the black hole would be far, far smaller than an atom, it would release more energy than an atomic bomb as it radiated its mass away.
from Kurzgesagt - In a Nutshell
Key Facts In This Video
A black hole with the mass of a nickel would cause an explosion three times bigger than both atomic bombs combined. (0:42)
A black hole as wide as a nickel would have slightly more mass than the Earth. (1:02)
A black hole with the radius of a nickel would destroy the Earth and draw the moon into an elliptical orbit. (1:58)