Posted on 12/25/2008 7:55:05 PM PST by Soliton
After 10 years and many thousands of replies, I am leaving FR.
I don't really care, and I don't know why anyone else would.
I am leaving before I am banned (again). Truth doesn't seem to matter on FR. I don't know if it is donations or sympathetic opinions that do, but I have been suspended twice when I followed the rules and the people who complained to the moderators didn't, yet the moderators sided with them.
For the record, evolution is a fact and the Shroud of Turin is a fraud. I would prove it if the admin moderators would let me, but they won't. Your resident "expert", Swordmaker won't debate me because he can't.
I will work to build a forum where members have rights and truth matters.
Merry Christmas
No, I pointed out that one can determine mass without gravity.
The reason fat analysis requires the particular methodology of immersion is that volume is needed for the formula.
Right, and generally fat is spoken of in terms of mass, not volume.
Like the one he moderates is?
pfffttt.....
Like the one he moderates is about science?
pfffttt.....
It’s about slamming TOS...
Why do you keep ragging on tpanther about stuff he never said or meant?
Newtons laws are wrong. We just have two theories that seem to hold up, Relativity and QM and they contradict each other. My money is on Shrodingers equation.
By the way, it is impossible to prove anything, all we can do is falsify something.
So how does your procedure calculate the fat content or percentage for people who don’t float?
http://www.sports1234.com/swimming-diving/2324-Swimming-Diving.html
I’m dying to hear how you weigh someone via immersion if they are too dense to float.
Newtons laws are not wrong. It just depends on how they are used and what reference frame the measurements are made in.
Please provide sources to back up your contention.
Sure...after all, we might be wrong about that whole germ theory thing...it's not proven, somebody may come along and falsify it.
Good grief.
TOS?
The Original Series - It’s a star trek thing.
Oh man, you went and asked him a yes or no question! You may not get an answer for two years!
Oh...and last time I checked, objects in motion still tended to remain in motion, objects at rest still tended to remain at rest and every action still had an equal and opposite reaction.
Now if the opposition knew anything, he might have responded, as Swordmaker did, that displacement can indirectly measure weight. He might also have pointed out, as I eventually did, that the body fat determination requires both weight and volume.
It's kind of amusing that we now have the assertion that Newton was wrong. Well, of course Newton's formulas fail under extreme conditions. All scientific laws are limited to a range of conditions.
But I find it a bit ironic that the use of body immersion to measure weight fails for a significant number of people -- those whose body density is so great that they cannot float. One doesn't have to approach the speed of light to find the limits of this procedure.
Ha! Actually, that’s how I first translated it when I saw it, but I thought it might be something else.
Sounds like a real bunch of tools over there.
She keeps insisting that I am either dimensio or solitron posting under a different account. That is what I was trying - poorly it seams - to get across.
Now I am going to have a nice cup of tea.
Newtons laws are wrong. We just have two theories that seem to hold up, Relativity and QM and they contradict each other. My money is on Shrodingers equation.Sad.
By the way, it is impossible to prove anything, all we can do is falsify something.
It is possible to obtain an estimate of body density without directly measuring weight underwater, and without directly measuring water displacement....
A person who neither floats nor sinks with empty lungs in water would have a density of approximately 1 kg/L (the density of water) and an estimated body fat percentage of 43% (Brozek) or 45% (Siri), which would be extremely obese. Persons with a lower body fat percentage would need to hold some kind of flotation device, such as an empty bottle, in order to keep from sinking.
...
A light plastic bottle filled with air makes a convenient floater, since the amount of air in it can be adjusted and accurately measured. The plastic occupies only a small volume is about the same density as water so that there is very little error in not correcting for the plastic bottle. The measurement begins with the bottle completely empty. The subject is asked to expel as much as possible from the lungs and use the bottle as a completely submerged floater. Water is allowed to enter the submerged bottle until the person sinks beneath the surface without touching the bottom. The liters of air in the container is equal to the kg of water displaced. v is equal to this kg plus the estimated 1.2 kg of water displaced by the air remaining in the lungs after full exhalation.
Embedded in this description is an explanation of why someone could assist or participate in this procedure without understanding any of the science. In practice, the procedure uses shortcuts and lookup tables that eliminate the need for understanding the concept of displacement and relative density.
But here is the interesting phrase, following the formula:
where ρr is relative density, W is the weight of the body, and Wi is the apparent immersed weight of the body. Absolute density is determined from the relative density, and the density of the liquid. Because the density of water is very close to 1 , when density is computed relative to water, for many purposes it may be treated as absolute density.Note that it is unnecessary to actually weigh a body under water in order to determine its volume, density or, for that matter, its weight under water. Volume can be easily determined by measuring how much water is displaced by submerging that body.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.