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What happens when you submerge GoPro in water...while in orbit?
Posted by: space-time
Date: November 06, 2014 04:18PM
[www.youtube.com]
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: hal
Date: November 06, 2014 04:56PM
What I found interesting is that it seems that a blob of water at rest in a zero-G forms a sphere.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: space-time
Date: November 06, 2014 05:02PM
Fixed volume, minimum surface area. Nature likes symmetry.



Edited 1 time(s). Last edit at 11/06/2014 05:02PM by space-time.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: hal
Date: November 06, 2014 05:19PM
Quote
space-time
Fixed volume, minimum surface area. Nature likes symmetry.

so it seems... not sure if would have deduced it on my own without seeing it first...
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: Manlove
Date: November 06, 2014 05:20PM
Brilliant.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: Speedy
Date: November 06, 2014 05:40PM
Somebody needs to give the ISS folks something useful to do to keep them busy.



Saint Cloud, Minnesota, where the weather is wonderful even when it isn't.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: freeradical
Date: November 06, 2014 06:15PM
It would be more fun to play with a big blob of mercury...like everyone did back when they were in elementary school...
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: Racer X
Date: November 06, 2014 06:45PM
Hey, a kid in my Sea Scout ship did that in the 7th grade. The EPA ran them out of their home for a week while the second story of their home was essentially rebuilt. He still isn't right to this day, even with chelation therapy. He brought home about a CUP worth of mercury from the science lab's storage room.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: freeradical
Date: November 06, 2014 06:59PM
A cup of mercury must be worth some serious coinage.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: hal
Date: November 06, 2014 07:15PM
I was walking home from classes at UCSD one day and saw the street roped off with "HAZARDOUS MATERIAL" signs everywhere and then guys in space suits wandering around. I gave the area a WIDE berth.

Turns out someone spilled a 1/2 liter of mercury...



Edited 1 time(s). Last edit at 11/06/2014 07:16PM by hal.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: eustacetilley
Date: November 06, 2014 07:51PM
Quote
freeradical
A cup of mercury must be worth some serious coinage.

Mercury is around $2 an ounce right now, or ~$33 a pound. (It's dropped ~30% since Summer.) Normally sold in "Flask" quantities of 76 pounds for ~$2500.
A cup is ~237 cc, a cc of Mercury is ~13.5g.
So a cup is ~3.2Kg, or about 7 pounds.
So a cup of Mercury is roughly $230, depending on temperature of course, Isotopic Purity, and the collapsing Metals Market.

¬Eustace
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: billb
Date: November 06, 2014 08:04PM
Quote
freeradical
A cup of mercury must be worth some serious coinage.


1/2 pound = $116
[www.sciencecompany.com]

4x distilled is worth more than 1x distilled or scrap



That would be nice.
I have about ten pounds. ( it is voltage arc contaminated )
The box of HG switch contactors is pretty heavy.
Might be more.



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Edited 1 time(s). Last edit at 11/06/2014 08:09PM by billb.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: steve...
Date: November 06, 2014 08:46PM
Can someone explain why all those errant water drops floating around in a closed environment with tons of electronics is OK?

Seems to me they could easily cause some damage.




Northern California Coast
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: hal
Date: November 06, 2014 09:24PM
Quote
steve...
Can someone explain why all those errant water drops floating around in a closed environment with tons of electronics is OK?

Seems to me they could easily cause some damage.

All of the electronics have to be 100% water proof. You can't have a little spill kill everyone on board. That would be a serious design flaw.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: davester
Date: November 06, 2014 10:04PM
Quote
Racer X
Hey, a kid in my Sea Scout ship did that in the 7th grade. The EPA ran them out of their home for a week while the second story of their home was essentially rebuilt. He still isn't right to this day, even with chelation therapy. He brought home about a CUP worth of mercury from the science lab's storage room.

That seems a little hard to believe. While it's important to clean up mercury spills, and mercury compounds are quite toxic,, liquid elemental mercury is not particularly toxic unless injected into the bloodstream or heated up and inhaled as a vapor. When I was a kid it was quite common to have liquid mercury available in various products (thermometers, thermostats), and many folks extracted that stuff and played around with it without ill effect. Also, even if the EPA existed back when you were in 7th grade they have never had authority over that kind of cleanup.



"In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion." (1987) -- Carl Sagan



Edited 1 time(s). Last edit at 11/06/2014 10:07PM by davester.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: Speedy
Date: November 06, 2014 11:20PM
You can play with it, even eat it, but don't breathe the vapor. Fortunately mercury has a very low vapor pressure compared to other liquids. But do clean it up if you have a spill to keep the vapor from accumulating.



Saint Cloud, Minnesota, where the weather is wonderful even when it isn't.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: GGD
Date: November 07, 2014 12:28AM
Quote
hal
What I found interesting is that it seems that a blob of water at rest in a zero-G forms a sphere.

You can see that effect on earth too, but on a smaller scale.





Edited 1 time(s). Last edit at 11/07/2014 12:45AM by GGD.
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: RAMd®d
Date: November 07, 2014 01:24PM
What happens if you drop a drop of detergent or soap on a sphere of water in zero-G?

Does it break up into smaller spheres?

I'm wondering how surface tension factors in.




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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: sekker
Date: November 08, 2014 10:33AM
I was laughing at the big NASA camera. I bet this iPhone camera would be as good at the indoor shots...
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Re: What happens when you submerge GoPro in water...while in orbit?
Posted by: davester
Date: November 09, 2014 05:26PM
Quote
sekker
I was laughing at the big NASA camera. I bet this iPhone camera would be as good at the indoor shots...

Highly unlikely given the tiny sensor in the phone.



"In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion." (1987) -- Carl Sagan



Edited 1 time(s). Last edit at 11/09/2014 05:27PM by davester.
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