how long will it take for styrophome to break down under water?
449437
First we need to clear up what you mean.  'Styrofoam' is a trademarked name for a type of panelled home insulation.  They failed to protect the trademark well enough, so now "closed cell foam" is pretty much routinely called Styrofoam, and it's not.\n\nAnyway, blocks of closed cell foam used for flotation (such as under floating docks, and inside closed areas of boat hulls, etc.) are more likely to be broken or damaged by improper handling, exposure to rough weather and freeze/thaw conditions, and other mechanical damage.  In addition, many types of closed cell foam will break down in sunlight, so UV protection is vital.\n\nIf your blocks are adequately protected from wear, breakage and sunlight, then water itself is unlikely to harm them.  (Keep in mind also that some types of closed cell foam, such as the kind used in coffee cups and packaging materials, are made of corn starch and are *intended* to break down over time.  You don't want that for your floating dock, diving platform, etc.!!)
242420
Wow, amazingly my roommate's 10 year old did this experiment for his science project a few weeks ago.  If the still water is hot, it doesn't take too long.  I think it was around 30 seconds for the mix to be complete.  If the water is cold, then it takes significantly longer (if you mean complete diffusion, then it would probably take five minutes).  We stopped the timer when we could not see a significant amount of clear water, and it appeared that the dye had spread through most of the water.  I think it was around 3 minutes (maybe a little more).  We used a cup of water and two drops of dye for each test.  We timed hot water and cold water spreading.
197975
The guide was right. It does break the surface tension. It's the surface tension that delays the eruption time. Otherwise, it would erupt almost exactly the same time everytime.
9150
Actually, removing the sponges would cause the sea level to drop (the sponges do take up volume).  Perhaps you could personally remove them with all the spare time you have on your hands.
351295
I had a broken vessel a few years ago that took about 3 weeks to completely resolve.  I think you can expect it to last at least 2 weeks and probably up to a month.
791599
It is very simple. I used to be a swimmer and it happend to me many a time. It sounds a bit rediculous but you just tilt your head to the side where the water is, hen just jump up and down. It will be out in a matter of seconds. Trust me.
854819
It mostly depends on the direction the meteor comes from and how fast it was before entering Earths atmosphere (although because of resistance of air the speed cannot exeed a certain velocity - I'd say >1000 miles per hour - before it breaks up into pieces), then it depends on where it hits the surface of the ocean ( if it's next to you - not as bad as 5 miles offshore )\nso to say the deeper the water is the more likely is a tsunami\n\nUnderwater earthquakes are even harder .... It depends on the force of the Earthquake, it's epicentrum and then of course how deep the water is....\n\n\nbut to take likely figures I'd say the meteor should have 1 mile diameter to destroy the west coast - or at least a part of it\nthen the earthquake mush be somewhere around 6 to 7 on Richter scala\n\n\nwhy do you ask - are you on a apocalyptical trip, if so you've forgotten about the supervolcano in Yellowstone
181773
Depending on size and elevation, there a certain problems. If the Containment tank not properly designed it will begin to "Sag" in time. The Structure can Break away from the supports. A high wind storm can damage the Structure. The list can get long, that some basic problems.
494601
its between 12 to 15 hrs ...better close to 15 hrs.
1145628
Probably about 2-3 months.  If it comes off fast, it will usually come back on even faster.  Wait it out.
328726
mine took about a year. i couldn't stand up straight, it felt like every thing was falling out.my sister had the bikini cut,and was at the beach 2 weeks later.
1108123
Nothing. From the equation T=2pie x root(l/g). g= acceleration due to gravity. It does not have anything to do with the mass of the bob. Frequency=1/T. So nothing will change, if the water leaks out or stays in, the pendulum's frequency would be normal.\n\nT=time period
56505
ok, well it depends on the container, what is in teh water, if teh container is filled with water to the top or if there is expansion room.  Also elevation, temperature and pressure (air pressrue) would have an impact because the container might just crack or explode
327534
I don't believe so. That's why it's called 'terminal'. The surface of water when hit at high speeds isn't any 'softer' than actual ground. It just looks more pretty.
603330
A dead body, after about 24 hours will normally afloat. Because human tissues started to decompose and microorganisms that are human's normal flora(pathogens living within the body) will start to create/form gas. They are commonly classified as gas-forming organisms. When they have form enough gases within the body to bring the body to the water surface, the body floats on the water.\n\nWe have to remember, that thru the process of mitosis, each single organism divides into two every fifteen minutes or sooner due to some mutation. Granting that we'll start counting them in millions, just imagine how much they will be in 24hours.
989412
As the body decays, gas builds up inside the body. The gas is lighter than air, and eventually enough of it builds up that the body can be lifted and raised to the surface of a lake, river, ocean, etc. The gas can build up to such an extent that it can act much like blowing up a balloon too far. In other words, it can explode - not like a bomb, but breaking through the skin to allow the gas to be expelled.\n\nThis is why after boating accidents, bodies are not recovered for a week or more. The body initially sinks, and depending on the warmth or coolness of the water, can stay under for at least 3 weeks (as in the case of a cousin of mine) before the gas brings it to the surface.\n\nAs for "no amount of weight can keep it down," this is not correct, as proved by Lacy Peterson, whose husband, Scott, was convicted of killing her and her 8-month old unborn baby, weighed down the body and threw it in the San Francisco Bay. The body literally exploded with the gas, expelled the baby, and eventually all that washed up on shore were parts of the body that broke loose in the flow of the tide, I believe the whole baby's skeleton, but just the head and torso of Lacy. The skin, muscle, ligaments, etc., eventually dissolved and only skeleton was left. There was enough weight to keep the body down until only the skeleton was left.
461210
Anywhere from 2 to 5 days.