Physics Rant: The Truth to Buoyancy in Diving

[Thalassamania]

Double entry buoyancy control?

 

[J.R.]

Hummm... it has occured to me that unless you're embedded in the bottom you're "bouyant"... and, in as much as muck is a viscus material, one could even consider muck embeddment to be a form of bouyancy relative to the bedrock below that...

... geez', I *LOVE* science...

 

[Randy43068]

Double entry buoyancy control?

stop talking dirty!

 

[Flightlead]

For simplicity, we will define Gravity as the 'downward' magnetic pull of the Earth on any object with Mass (ie, how much something weighs).

Gravity != magnetism. In fact they behave VERY differently. And that is a benefit for those of use who aren't entirely ferrous and would like to not float off into space. In fact they are two of the four fundamental forces, which you should know. Perhaps you mean "attractive", which gravity always is despite its long term effects on aging members of the population?

 

[4sak3n]

Gravity != magnetism. In fact they behave VERY differently. And that is a benefit for those of use who aren't entirely ferrous and would like to not float off into space. In fact they are two of the four fundamental forces, which you should know. Perhaps you mean "attractive", which gravity always is despite its long term effects on aging members of the population?

Just out of interest, what are the other two fundamental forces? Strong and weak atomic? But what about attraction of opposite electric charges? Or is that an offshoot of magnetic attraction?

 

[Charlie99]

Just out of interest, what are the other two fundamental forces? Strong and weak atomic?

Yes. aka strong and weak nuclear forces.

But what about attraction of opposite electric charges? Or is that an offshoot of magnetic attraction?

The electromagnetic force combines both electricity and magnetism, as well as electromagnetic radiation such as radio and light. (As in the geek t-shirt that has Maxwell's Equations followed by ".... and let there be light")

 

[Gombessa]

Just add a pinch of gravity, and you'll find your GUT is hanging out.

 

[Charlie99]

Just add a pinch of gravity, and you'll find your GUT is hanging out.

Only for a little while. Very little.

 

[Twistedarts]

Your OW instructor may be incompetent, but it's not likely his fault. You are both victims of the the way the world learns to dive.

All is now right with the world. I knew Walter would find a way to throw a padi bash in there!!!

 

[Cave Diver]

[hijack]

While we're on the subject of rants, the thing that really bugs me is when someone is busy correcting a widely accepted standard; they fail to proofread their own rant. Or do the "other students/divers" actually make sounds when you explain this?

Negative Buoyancy is just wrong. It is never buoyancy that causes something to sink, it is gravity. Buoyant forces can never be 'downward'. Negative Buoyancy is used to describe an object that Sinks. The term Heavy is more appropriate, and I have sound it readily understood by other students/divers.

[/hijack]