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can graphene be used to filter sea water into drinking water.
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  • Asked by garth
  • on 2012-01-26 20:41:54
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Categories: Technology.

Tags: water, sea, salt.

 

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Four-star review

We found this starfish with four arms about 100 kilometres south of Broome on the north-west coast of Australia. Is it unusual? How did it evolve? How many or how few arms can starfish have?

Dave and Fiona Harvey, Ecobeach, Western Australia

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Editorial status: In magazine.

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Last edited on: 2011-11-03 11:04:57

Categories: Animals.

Tags: sea, Sealife, beachcombing.

 

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Which is the more efficient swimming stroke - the up/down tail motion of dolphins, or the side-to-side motion of sharks?
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Categories: Animals.

Tags: animals, sea, Swimming, shark, dolphin.

 

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Strange tidings

Sailors in coastal waters say that when the tide changes, more often than not the wind direction changes too. What links these two events, one of which is astronomical and the other meteorological?

John Franklin, London, UK
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Categories: Planet Earth.

Tags: sea, Astronomy, wind, tide, meteorology, sailing.

 

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Sea

if i put an object into the sea. a golf ball for example, would that raise the whole sea level. even if it was extreamly small?
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  • Asked by RY4N
  • on 2011-03-10 16:10:31
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Categories: Planet Earth.

Tags: sea.

 

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Why Pick on Thailand?

A report in this week's New Scientist says that sea levels are rising by 4mm/yr in the Gulf of Thailand compared to 1.8mm/yr in the rest of the oceans. How can this be so?
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Categories: Environment.

Tags: sea, rising, level.

 

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How low would the sea level be if water had the ability to be pressurised in the same way gas is?

If water could be pressurised, how low would the sea level be due to the pressurising weight of the overlying water?
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  • Asked by Damps
  • on 2011-01-20 13:22:29
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Categories: Planet Earth.

Tags: sea, pressure, Sealevel.

 

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Video cameras on sea animals

I always watch National Geographic movies and question myself: if you put a camera on the back of a seal, a penguin or some other underwater animals, does the animal even notice it, and does it hurt the animal?
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Categories: Animals.

Tags: technology, sea, camera, Underwater, wildlife.

 

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How high a mountain would all the salt, (if extracted) in the oceans form, and where did it all originate from ?

I've seen the animations of icy meteorites filling the primordial oceans with (presumably) pure water, but rocks are not naturally 'salty', in a potato crisp sense, and extracted salt is from dried-out deposits originally from seawater. And why Sodium Chloride in particular ? 
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Categories: Planet Earth.

Tags: Earth, ice, sea, salt, meteorites.

 

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If a nuclear weapon was detonated at the bottom of the sea (deepest point) what would happen?

The Challenger Deep in the Mariana Trench is the deepest point in Earth's oceans. The bottom there is 10,924 meters (35,840 feet) below sea level and therefor at a pressure of nearly 2000bar.  Even if the bomb detonation was higher pressure than would a steam bubble be generated or would it remain as superheated water and just dissipate?  If a steam bubble was generated would the shear mass of water surrounding the detonation point condense it?
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Categories: Unanswered.

Tags: sea, Nuclearbombs, steam.

 

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