Yes, people trip if it is not. Remarkably almost all cultures use the same ratio.
The run is always longer, if not, I bet your staircase does not meet code
Either can be bigger: it is no big deal.
It is harder to build a spiral Staircase because if you build a spiral staircase it will be longer and twistier than a straight staircase.
usually
Rise over run is used to determine slope. It doesn't matter which number is bigger. It simply tells you how far up a slope climbs over what distance. So on a roof for instance, 4/12 means the roof climbs 4 inches higher every foot of width.
Males always have bigger antlers than females.
yes
No
no
(3 and any fraction less than 1) is always bigger than (1 and any fraction less than 1).
A male tiger is always bigger.
It's not. Intake valves are almost always bigger.