Cool 😎 Strange 🤪 or obscure 🙃 / interesting things...

[Exige]

 

[Exige]

 

[Exige]

 

[Exige]

 

[Exige]

 

[Exige]

 

[Exige]

 

[Exige]

 

[JimVee]

Aerographene or graphene aerogel is, as of April 2020, the least dense solid known, at 160 g/m3, less than helium. It is approximately 7.5 times less dense than air.

 

[Loz]

Aerographene or graphene aerogel is, as of April 2020, the least dense solid known, at 160 g/m3, less than helium. It is approximately 7.5 times less dense than air.

View attachment 80375

Also known as exigephene cos it's so damned svelte.

 

[Hughdg]

If it's that light why is it resting on the flower?
Surely at 7.5 times less dense than air and less than helium. How come helium balloons float and this doesn't?.
Or am I missing something about it?

 

[Mr Bimble]

If it's that light why is it resting on the flower?
Surely at 7.5 times less dense than air and less than helium. How come helium balloons float and this doesn't?.
Or am I missing something about it?

Unless it's very cold, helium isn't normally solid.

Or someone glued it to that flower.

 

[Laava]

If it's that light why is it resting on the flower?
Surely at 7.5 times less dense than air and less than helium. How come helium balloons float and this doesn't?.
Or am I missing something about it?

Can someone pass me the popcorn please?



Great find tho, JimVee!

 

[Laava]

Ok, so google said this. Bearing in mind google would also have you believe that the earth is round!



There is a huge amount of empty space in aerographene (and other aerogels). However this space is filled with air, and precisely because it is filled with air it doesn't float.14/07/2013

 

[Mr Bimble]

Witches float, as do apples, bread, small stones, ducks, churches and lead.

Just saying……

 

[wroughtironron]

 

[wroughtironron]

Oooo-errr

 

[wroughtironron]

 

[wroughtironron]

 

[wroughtironron]

Useful

 

[wroughtironron]

or you could try our

 

[AirCon]

If it's that light why is it resting on the flower?
Surely at 7.5 times less dense than air and less than helium. How come helium balloons float and this doesn't?.
Or am I missing something about it?

A common question with aerographene, that I myself also had, was if aerographene is so much lighter than air, why doesn’t it just float away?

Within aerographene, there is a ton of empty space because of all the air inside. This, though, is precisely why aerographene doesn’t float. The volume of air that the structure displaces takes up the volume of the tiny nanotubes of aerographene. The weight of the displaced air displays the buoyant force, which is not larger than the weight of the aerographene.

 

[RA5]

So air+(<air)=air+?

 

[JimVee]

 

[Noobie]

Red line, meet red line crossed, meet red line consequence

 

[wroughtironron]

 

[wroughtironron]

 

[wroughtironron]

 

[Noobie]

Bound for Essex flats no doubt.

 

[Exige]