Back in the dawning heyday of the superhero, writers were still determining the extent of Superman's powers. There was a time when Superman's powers didn't come from our yellow sun. One important distinction between then and now was that Clark couldn't fly. He was only "able to leap tall buildings in a single bound". It was explained that his super strength was a result of Krypton's larger gravity.
So, Detective, based only on the statement that he is "able to leap tall buildings in a single bound", what was the mass of Krypton? Some help for this Fermi question: It's a good idea to guess that Krypton is about the same size as Earth. You might be interested in remembering some high school physics that to jump to a height (h) you initially need the same kinetic energy (KE = 0.5 * m*v^2) as the potential energy at the top of your jump (PE = m*g*h).
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2 months ago