It all depends on how fast the river flows, how straight it is and the weight of your body.
If you're unconscious in a river on your own you'll probably drown, so to answer your question, indefinitely, depending on the length of the river and other variables such as the geography of the land for example you could get stopped on a meander in the river.
It all depends on the rivers energy andstrength not all rivers are same asit depends on three things:erosion, transport and depositation.
None
on the slope down from the top of the river, to the bottom of the river
hi there the reason for this is if you are mesuring the float time near the source of the river then it will take longer because the river needs to build up velocity as the river travels down steam is you take you data near the mouth of the river that float time will be shorter because the river velocity will have increased in speed i hope i helped out.
Cultural tradition.
The Mayflower..
Eggs Dont Float.
just talk to him then watch him float down the river
this is when you and your buddies get innertubes (1 for each of you important not a good idea for more than 1 person to get on 1) go up river and float down river whether for site seeing or fishing yay
people would put their stuff in boats float it down the river and sale the stuff
The tree would most likely float down the river as it is way to heavy to sink.
The Colorado River flows fast because it flows down hill in the grand canyon and picks up speed.
A FAST Process is a rabid process that slows down after a river runs into it then it becomes a slow process