A fast fast

[snoopy369]

If it is mass>0 then you have lost weight/mass, but gained density (if it's lighter than water, in fact).

[Cort Haus]

Surely it is not the mass that counts in a gravitational situation, but weight.

[snoopy369]

Surely mass and weight are directly proportional.

[Cort Haus]

In zero gravity you have no weight, but the mass remains the same.

[Proteus_MST]

In zero gravity farting might be used as a means of propulsion

[snoopy369]

Sorry.

Surely mass and weight in the same gravitic environment are directly proportional.

[Lorizael]

I believe your mass would only go up after expelling lighter-than-air fart gas if that fart gas were then replaced by air.

[snoopy369]

Originally posted by Lorizael
I believe your mass would only go up after expelling lighter-than-air fart gas if that fart gas were then replaced by air.

Which it is not, of course

[Lorizael]

Unless, perchance, during the farting process, there is an opportunity for some air to, perhaps, leak in before you close back up.

[Adrian Hon]

Whether or not any air leaks in (and I don't think it does), we live in an atmosphere, and since the fart gas is lighter-than-air, your weight goes down. Now, if you were on the Moon and you farted, your weight would go down (assuming you had some sort of fart gas valve on your spacesuit or whatever).

[Adrian Hon]

Actually, I spoke too soon - obviously it does matter if air leaks in, but it depends on how much, etc.

[Proteus_MST]

Originally posted by Adrian Hon
... (assuming you had some sort of fart gas valve on your spacesuit or whatever).

Without such a thing NASA might be strongly advised to never include beans or cabbage in the meals that their astronauts get, to avoid accidents with astronauts suffocating in their spacesuits

[snoopy369]

Originally posted by Adrian Hon
Whether or not any air leaks in (and I don't think it does), we live in an atmosphere, and since the fart gas is lighter-than-air, your weight goes down. Now, if you were on the Moon and you farted, your weight would go down (assuming you had some sort of fart gas valve on your spacesuit or whatever).

I think that word does not mean what you think it means.

Weight = Pull of gravity on a mass = proportional to mass when gravity is constant

Density = Mass over volume

Density is not relevant to weight. As stated above, unless the fart is replaced by a greater mass of air - which it, generally, is not - you are expelling mass/weight.

[Proteus_MST]

Originally posted by Adrian Hon
Actually, I spoke too soon - obviously it does matter if air leaks in, but it depends on how much, etc.

Which on the other hand might depend on the length of the fart (and therefore the mass of the gas farted out).

With sufficiently short farts (microfarts) one might perhaps even gain weight, as the amount of gas farted out is almost completely replaced with the heavier surrounding air (assuming that the amount of air that leaks in after farting is independent from the length of a fart)

[Lorizael]

I love Apolyton.