Question

*ANSWER GETS MEDAL*
How much power would it take to climb a flight of stairs twice as high in the same amount of time as the first time you went up the stairs?

Answer 1

Twice as much power.

Answer 2

2 times the power

Answer 3

This isn't physics.

Answer 4

Double the power. Added air resistance and such should be negligible. The hard part is putting out double the power, creating more heat that needs to be cooled, and for muscles getting enough oxygen and removing waste from the process (lactic acid, etc).