for the scientists: weight loss question

[Chuck(G)]

Let's think about this one for a second or two.

Methane (CH4) has a density of 0.717 kg/m³, while air is nominally about 1.2 kg/m³ at sea level and 20°C.

Thus a blue one is almost half the density of air, which means that venting will actually reduce your atmospheric bouyancy and make you appear to be heavier.

So, you're better off keeping it all in, if the number on your bathroom scale is your criterion.

I trust that clears the air.

[lgb&dtuba]

How about vertical thrust to counterract weight? Subject to interference from clothing, of course. How much increase in thrust would you get from lighting an S.B.D. vs a Rafter Raiser?

I guess you'd have to read the scales fast, though.

And, of course, flatulance is a renewable resource.

Jim 'Where did I bury that Kimchi?' Wagner

[ken k]

Wade,

Having unfortunately had to do this a few times, I can assure you that heads way more than 12 pounds. Much closer to 18.

So Harold are you saying that you have had to cut off heads a few times??

This could be a case of TMI, of course this entire thread could fall in to that category.

ken "who thinks this thread really stinks...." k

[SRanney]

OK. Tons of us are interested in weight loss - something that has possibly become a nearly trillon dollar industry. A friend of mine thinks he discovered a way to lose some weight FAST. This involves the conscientious expulsion of excess gases (enthusiastic flatulation).

My friend argues that (if properly applied) this would reduce the overall quantity of body matter (cells, molecules, etc.) to a minimally measurable degree, and thus weight loss would occur.

My argument is that the occurance would inevitably cause body buoyancy to be reduced, and thus an actual weight INCREASE would be realized.

What say ye men of great physical wisdom?

Weight is a function of (Mass * Gravity). If you lose mass, whatever way you choose to do it (e.g. chopping off your own head, farting excessively), your resulting weight will be lower.

That said, you'd have to have a scale accurate to a high degree of resolution to even begin to see changes.

[Chuck(G)]

Weight is a function of (Mass * Gravity). If you lose mass, whatever way you choose to do it (e.g. chopping off your own head, farting excessively), your resulting weight will be lower.

That's what the 6th grade science textbooks would like to tell you, but unless you're weighing things in vacuo, a scale measures the gravitational attraction between the earth and a body, less any secondary effects from the medium in which the object is immersed as well accounting for any inertial effects.

One is nearly weightless about the International Space Station, not because there's no gravity, but because one is essentially in continuous free-fall (inertial effect). ANd you "weigh" more in an ascending elevator.

You "weigh" less in water than you do in air. A helium-filled balloon "weighs" less than an empty one, even though a filled balloon has more mass.

So, if you see my comment above, the effect of expelling methane is more akin to letting helium out of a balloon.

[windshieldbug]

But what if you light it?
(Or burn a viola?)

[Chuck(G)]

But what if you light it?
(Or burn a viola?)

Well, then it's less like a weather baloon and more like the Hindenburg.

[windshieldbug]

So THAT'S what hit Roswell!

[LoyalTubist]

How I lost 30 pounds:

I am an almost 50 year old man, 5'10' tall. When I moved to Vietnam, I weighed 225 pounds, making my Vietnamese bride seem smaller than the 4'11", 95 pound woman she is. Moving to Vietnam was my first step in losing weight. For my first month here, I lived as a tourist. I ate nothing but fast food. I gained ten pounds. My employer paid me well but began reducing my hours (I earn wages, not a salary.) I worked with that employer until Christmas Day (yes, I worked on December 25, it's not a holiday here). I now teach at a Vietnamese public high school, which pays much better than the private sector here. Because I had to make a month's pay last for two months, I had to learn how to eat like a local. I thought I liked Vietnamese food but, to be honest, I don't like most of it. So I eat a fraction of the food that's set before me. When I eat Western food now I eat only healthy Western food. My weight is now around 190 pounds. I should also mention that my mobility was impaired when I moved here because I broke my right big toe the week before I left Los Angeles.