If you jump off a bridge 50m above the water does the water need to be 50m deep?

[rewebster]

methane?


you don't mean 'landfill' or 'ocean/river' bottom methane, do you?

 

[Loren Booda]

I heard (must have been on the Discovery Channel) a theory that ships in the Bermuda triangle were sunk by large outgassing of methane due to an underwater landslide. Maybe "ocean bottom" methane.

 

[tony873004]

Actually, this was an easy Google ("bubbles of methane sink ships"):

http://www.abc.net.au/science/news/stories/s973492.htm
http://www.newscientist.com/article/dn1350.html

 

[Loren Booda]

Oct. 2007 Physics Today happens to have a related article (not about sinking ships, but gas storage) "Clathrate hydrates under pressure."

 

[rewebster]

I heard (must have been on the Discovery Channel) a theory that ships in the Bermuda triangle were sunk by large outgassing of methane due to an underwater landslide. Maybe "ocean bottom" methane.

ahhhh, it's from all those bean-eating Atlanteans still living down there---

 

[JimmyJockstrap]

If i drop a rock off this bridge approximately how long should it take to hit the water if it is 10-15m below?

 

[rbj]

If i drop a rock off this bridge approximately how long should it take to hit the water if it is 10-15m below?

you got to do your physics. do you know what the relevant equations are?

like

$$d = \frac{1}{2}a t^2$$