Now, let's assume an average depth of 15,000 feet of additional water above the former sea level.
Obviously that additional mass of water would have given Earth additional mass, which would have affected at least four or five things in the Sun-Earth-Moon system and to the inner planets.
BTW, I'm not a physicist so I'm happy to be corrected by someone who is. Hopefully, someone can do the sums and fill in the detail for me.
- To conserve angular momentum, the speed of rotation of the Earth would have needed to slow down so days would have lengthened.
- Similarly to conserve angular momentum in earth's orbit around the Sun, Earth would have needed to move away from the sun into a larger orbit to give a longer year.
- As Earth moved out towards the orbit of Mars and away from Venus these would have been disturbed in their orbits which would need to adjust accordingly.
- The additional mass of Earth would have pulled the Moon into a closer orbit.
So, to all you creationists who believe the science supports a literal interpretation of the Bible and the inerrancy of the Noah's Ark story, complete with global flood, and who keep telling us how you've all studied science and are experts in stuff like physics, these questions should all be answerable with ease.
Real physicists might like to have a go at this too, please. I'd love to know the answers myself. "A magic man did it by magic" seems such an unsatisfactory answer somehow.
- By how much would Earth's rotation have slowed down and how long would the days have been?
- How far out from the Sun would Earth have moved and how long would a year have lasted?
- How would the orbits of Mars, Venus, and maybe Mercury and Jupiter have been changed by the change in Earth's orbit?
- How much closer to Earth would the Moon have moved and why did it not get pulled into Earth to destroy both bodies in a catastrophic collision?
- By how much would the temperature have fallen on Earth as it moved away from the Sun and how did the water remain liquid at this low temperature so the Ark could float about?
Or would it be easier to conclude that the story is one of the least plausible in all mythology and could only have been made up by people completely ignorant of basic physics and astronomy?