[ukmicky]

simeonie

I dont think so, human bones are to heavy and not flexible enough.

[neilep]

quote:Originally posted by simeonie

if we had wings and a really strong chest could we fly?

----------------------
-__- my website!!!!
http://www.simeonie.co.uk
has forums too!
Think about it! lolz

Well..I presume if we had a strong chest and wings we'd also have very strong other bits to compensate !!...and if we had feathers and a beak..we'd all be birdies too !!

Men are the same as women.... just inside out !!

[Tronix]

im sure we could fly, but the wing span would be huge (remember the ptersaur?). Unless we had jet packs. come to think of it, we fly every day (and the wing span IS huge)...

--------------------------------------------
"If i cannot have company whose minds are clearly free, I would prefer to go alone."                  -Dr. Gideon Lincecum

The BPRD rejected my application becuase their brain-controled by Cthulhu Rip-offs. And im sure "Sparky" is sleeping with them too, kinky little firecracker she is...

[spade23]

I think that that is a brilliant idea.[][][]


newbielink:http:// [nonactive] | newbielink:http:// [nonactive] | newbielink:http:// [nonactive] |

[saanwal]

Dear Scientists
 
I want to know how much ozone layer is now left?
 
Please tell me.
 
Thanks

Saanwal.

[Razor]

quote:Originally posted by saanwal

Dear Scientists
 
I want to know how much ozone layer is now left?
 
Please tell me.
 
Thanks

Saanwal.

Well im not sure "how much" ozone layer is left but this website should help you to answer your question:
http://www.nasa.gov/vision/earth/lookingatearth/25TOMSAGU.html


-----------------------
"We apologize for the error in last week's paper
In which we stated that Mr. Arnold Dogbody was a defective in the police force. We meant, of course, that Mr. Dogbody is a detective in the police farce."
-Correction notice in the Ely Standard, a British newspaper

For those who haven’t seen this yet, it's a must view!!!!
CHECK IT OUT!!!!

http://www.ebaumsworld.com/presaddress2.shtml

Also:
http://www.svspower.com/
For Dodge Viper Fans.

[aasurfer33]

Hey really of the topic, but what does everyone on this post and the Dr. think the best college to go to for science in the states or anywhere else.

[pyromaster222]

the distance to other galaxies is measured by the dopler effect (or red shift) this is when galaxies move away from each other and is caused by light waves being "stretched" towards the red spectrum of light. Therefore the light has a reddish tint when observed. The severity of the red shift tells us how far away the galaxy is because the further a galaxy is from ours the faster its moving away, due to the fact that the universe is expanding in all directions at once.

[NakedScientist (OP)]

QOTW RETURNS !

To kick off a new series of "Question of The Week", have a go at this week's 'poser' :

- WHAT STOPS METAL BOATS (MADE OF IRON) FROM GOING RUSTY ?

Have a go below, answer next week.

TNS

[neilep]

Do they put a sign on it that says ' No Rust Allowed ' ?...because if I was a bit of rust that would stop me !...or is just some Anti-rust paint  ?

Men are the same as women.... just inside out !!

[ukmicky]

Can’t remember what their called or how exactly they work, but don’t they place special metal blocks under the ship which when given a charge attract the electrons released by the interaction of the salt water on iron, causing the metal blocks to rust rather than the ship. Or something like that[]

Michael                                      

[pyromaster222]

they have a magnesium or zinc block attatched to the boat. the magnesium or zinc is more reactive than iron and so is sacrificed and therefore reacts with the sea water rather than the iron. this means the iron stays rust free. this process is also used in galvinisation of fences etc. but the term galvinised is referred to objects covered in zinc..not any other metal.

[DrN]

ah yes - I remember something about a zinc (or somethng) block attached to the sewage pipe to stop that rusting. obviously it would be minor disaster (and not just to the blue flag status of the beach) if that got holes in it. so it must work I guess.

[chris]

ANSWER TO "WHAT STOPS METAL BOATS (MADE OF IRON) FROM GOING RUSTY ?"

You're right. Apart from a coat of paint, corrosion of the metallic parts of boats, pipes and oilrigs can be reduced by sacrificial protection. Put simply, by connecting a more reactive metal to a piece of iron - either by direct attachment, or even with cables, the more reactive metal sacrifices itself to prevent the iron from oxidising. This is analogous to a displacement reaction with electrons passing from the more reactive metal to the iron. Usually zinc (galvanising), or magnesium, are used and are referred to as "sacrificial anodes".

The chemical reaction is :

3Zn -> 3Zn++ + 6e-
2Fe+++ + 6e- -> 2Fe

In other words, the zinc (or magnesium) is oxidised (and dissolves) instead of the iron. The process will work as long as the two metals are electrically connected and in contact with the electrolyte. In the long run it's cheaper to replace the anode several times than to replace the boat !

Chris

"I never forget a face, but in your case I'll make an exception"
 - Groucho Marx

[chris]

Here's this week's Festive Christmas QOTW to mull over whilst enjoying your mince pies and port :

"WHAT IS HEAVY WATER AND WHY IS IT USEFUL ?"

Merry Christmas.

Chris

"I never forget a face, but in your case I'll make an exception"
 - Groucho Marx

[Soul Surfer]

OK I've left this to sit for 24 hours.  Heavy water is duterium oxide the combination of oxygen with the other stable isotope of Hydrogen duterium which has a neucleus of a single protn and a single neutron  it exists in water to a tiny proprtion and can be sperated by fractional distillation or electroysis.

Its main use is as a moderator in nuclear fission reactors using U235 because it is quite good slowing down the neutrons produced in the fission fron high speeds to "thermal" neutrons (thus extracting the energy of the reaction)the fission chain reaction in U235 will operate with thermal neutrons.  Using a moderator also renders the reaction more controllable by slowing the rates at which things can run away allowing it to be controlled with mechanical devices.

Learn, create, test and tell
evolution rules in all things
God says so!

[Bass]

I have this dim memory, eons ago, that ducks can't float on heavy water??
Any truth to this, or just another myth?

Subduction causes orogeny.

[DoctorBeaver]

quote: I have this dim memory, eons ago, that ducks can't float on heavy water??
Any truth to this, or just another myth?

That's because they're witches (Monty Python fans may understand that)
[]

[neilep]

I wonder of we should change the name of this thread from Question Of The Week to Question Of The Whenever !![]

Men are the same as women.... just inside out !!

[DoctorBeaver]

Questions from the stone-age[]