Re: How Fast Can I Go?
First, *Supergeek hat On!!"
Several Points:
First, sorry to dissagree with Trebuchet, but water at sea level is about 800x more dense than air at sea level (1000 kg/m^3 vs. 1.2 kg/m^3), so by this logic the character should lose about 99.88% of his/her speed underwater.
Second, staying in the water at this speed is a "real" concern. If the character has a speed of 5, they are travelling at 417 km/second, or about 50x orbital speed, so they will rise into outerspace quite rapidly unless they conciously decide to stay in the water or atmosphere (speed overcomes gravity..., see every spacelaunch).
Third, again sorry to disagree with Trebuchet, but this character, moving at this speed is a 100 kg comet, expending terawatts of power into the water, much of which would be reflected in a rise in the water (roostertail) above them. I think they would cause significant waves, probably up to tsunami standard. Even a jet-ski has a significant wake, and it moves at 20-30 kph.
All that being said, it is a comic book game, but a character with that kind of speed should probably only be able to use it in outer space. After all, even with going into space they could fly around the world in under 2 minutes, so why not travel in space to where you need to go, then fly in the atmosphere/water at non-Megascaled speeds.