The questions-not-worth-their-own-thread question thread VIII

[Brighteye]

Pressure counteracts gravity. If the water were to fall out the pressure at the top of the straw would decrease, crumpling the straw. But instead the water is held up because the force of gravity on it is not enough to buckle the straw.

 

[GinandTonic]

Why is it that if you dip straw in something like water or soda and you cover the upper opening with your thumb, the liquid will only leave in drops when you remove it from the cup or whatever medium you were using? If you remove your thumb and open up the straw though, the liquid leaves like the regular laws of gravity applied to them.

Water tension and pressure differential. With the end of the straw covered as the water starts to leave the straw in creates a low pressure area in the top of the straw. If the straw is thin enough air cannot bubble up through the straw because the surface tension of the water is too great.

So basically some water does leave the straw at the very start until an equilibrium is reached when the sucking effect of the low pressure air at the top of the straw + the water tension at the end of the straw = the effect of gravity on the water in the straw.

Same effect broadly speaking as when a bottle is tipped and the liquid "glugs" out. The low pressure in the bottle builds as the liquid leaves until it is strong enough to suck air in against the gravity working on the liquid. The difference being that the neck of the bottle is wide enough, and the volume of the liquid great enough, that surface tension is essentially meaningless.

 

[Yared]

kthx!!

 

[Birdjaguar]

"ancienne gérante de la fromagerie"

Anybody have a quick translation?

 

[kulade]

the ex-manager of the cheese store.

 

[Birdjaguar]

Thanks very much!

 

[Garonius]

"ancienne gérante de la fromagerie"

Anybody have a quick translation?

Ancient (age?) of the cheese store. OTTOMH.

the ex-manager of the cheese store.

Oops my bad should of read ahead.

 

[really]

the ex-manager of the cheese store.

the feminine ex-manager of the cheese store

 

[PlutonianEmpire]

Does metallicity affect a star's stellar radius?

 

[PeteAtoms]

Does metallicity affect a star's stellar radius?

I want to say that it makes the radius smaller, because there is more mass... and the amount of metallic is correlated to age.

I'm still googling I'll edit this post if I find anything more specific.

 

[Birdjaguar]

the feminine ex-manager of the cheese store

Yes, Helene Coutier did have a fromagerie in Pont d'Ain.

 

[GinandTonic]

Does metallicity affect a star's stellar radius?

I want to say that it makes the radius smaller, because there is more mass... and the amount of metallic is correlated to age.

I'm still googling I'll edit this post if I find anything more specific.

Interesting.

I'ld always considered that what a star was constituted of was a function of it's size and how far along it had got along its fusion process. So larger stars would be more metallic as they would have the energy for the more exotic transformations to produce more metals.

EDIT -

And obviously stars on the whole tend to get larger with age, while older stars have also had the time to go through the sequence to produce more of the complex elements. Not to mention that to have more than iron (and poss magnesium? something else as well?) doesnt a star have to be bloody huge anyway?

 

[Genocidicbunny]

Metallicity and star radius arent necessarily dependant on each other. There are high-metallicity stars that are considered dwarf stars. With that aside though, metallicity does generally increase with age, and so does the radius of the star.

See http://en.wikipedia.org/wiki/Barnard's_Star

 

[kulade]

How do you guys pronounce "cache" and "cached?"

 

[Azale]

cash/cashed?

 

[kulade]

Is that cashed as in cashd or cashaid? For some reason I've always thought of it as cashaid...

 

[Genocidicbunny]

Cached : cashd
Cachet : cachait

 

[Azale]

Is that cashed as in cashd or cashaid? For some reason I've always thought of it as cashaid...

cashd, though I think it's the wrong pronunciation for cached.

 

[Brighteye]

How do you guys pronounce "cache" and "cached?"

It depends what sort of cache.
When I hide something, or have stored it, I pronounce it like 'cash' or 'cashed'.
If I want to say that an item is stylish, I might say that it has cachet, in which I pronounce the second syllable.

 

[GinandTonic]

An arms cash vs The caché of having the biggest willy in town.

Similar to a a caf(e), a diner. A café, had decent coffee.

Question -

Does having my memory stick on the same keyring as a magnetic security fob do bad things to the flash?