Nice people thread part 4 - sugar and spice and all things

zagubov

HAMISH_MCTAVISH wrote: »

Quantum Levitation.

By far the coolest thing I've seen in a very long time. (Watch to the end)

http://www.escapistmagazine.com/news/view/113717-Quantum-Levitation-The-Coolest-Science-Youll-See-Today

I guess that trumps this invisible water video!
http://www.metacafe.com/watch/385694/invisible_water/
:cool:

GDB2222

zagubov wrote: »

I guess that trumps this invisible water video!
http://www.metacafe.com/watch/385694/invisible_water/
:cool:

Unless there are some strings I can't see, I think that that tank is full of a rather dense gas. I must do the sums and check if that would work, or maybe Lydia will get interested and show it to her class?

zagubov

GDB2222 wrote: »

Unless there are some strings I can't see, I think that that tank is full of a rather dense gas. I must do the sums and check if that would work, or maybe Lydia will get interested and show it to her class?

I believe it's sulfur hexafluoride so it's an ultradense gas. :cool:

GDB2222

zagubov wrote: »

I believe it's sulfur hexafluoride so it's an ultradense gas. :cool:

Yes, density is 6.2 g/l, compared to 1.3 g/l for air

So, if that aluminium foil tray holds around 3 litres (of air), it will float as long as the weight of the aluminium foil used to make the tray is under about 15g.

Edit: looking at the video again, I think the volume of the tray is more like 7-8 litres. Still, it's a neat trick.

zagubov

GDB2222 wrote: »

Yes, density is 6.2 g/l, compared to 1.3 g/l for air

So, if that aluminium foil tray holds around 3 litres (of air), it will float as long as the weight of the aluminium foil used to make the tray is under about 15g.

Edit: looking at the video again, I think the volume of the tray is more like 7-8 litres. Still, it's a neat trick.

Good, isn't it! Makes you think of all the cynics who claimed metal ships couldn't float!

Lydia, forgot what you teach- is it physics?:)

JonnyBravo

Generali wrote: »

A bloke I used to work with bid £6,500 for a pair of jet skis after a client lunch. He and his Missus were saving for their wedding at the time. luckily he got outbid in the end. He did manage to buy a classic car one time while drunk.

Supposedly, his mate bought a bouncy castle business after lunch on eBay and quit his job! Apparently he made some money but he was very bored.

I can't vouch for the second bloke but I can for the first.

A mate of mine bought his dream car off ebay.
A DB7 for just £20k. Thing is, he hadn't even seen it. As you might expect at that price it lasted a couple of years before the engine expired.

SingleSue

I bought my current car off Ebay, difference is that I did go and see it before I put my bid in as it was literally around the corner from my house and 4 years on, it is still working.

I paid £461.,,,,if it was 20k, I think I would have seen it more than once before bidding!

SingleSue

sss555s wrote: »

My heating has been on "big style" tonight

It has got winter like up here the last couple of days

I'm still refusing to put mine on although my tootsies were feeling a little like ice yesterday, mind you, middle son is still stripping down to his underwear in the house as he says he is too hot! That said, this is the same child who was moaning about having to put a jumper and gloves on to play in the snow last year as it was too warm to do so..........

Oh, and at least he keeps his underwear on now, when he was small, he would strip naked at playgroup in the middle of winter because he was overheating (we would all be shivering in the corner)!

lostinrates

SingleSue wrote: »

I'm still refusing to put mine on although my tootsies were feeling a little like ice yesterday, mind you, middle son is still stripping down to his underwear in the house as he says he is too hot! That said, this is the same child who was moaning about having to put a jumper and gloves on to play in the snow last year as it was too warm to do so..........

Oh, and at least he keeps his underwear on now, when he was small, he would strip naked at playgroup in the middle of winter because he was overheating (we would all be shivering in the corner)!

Does he overheat in summer too?


It is cold, but luckily its beautiful too. I woke up a lot in the night...when the hedgehogs escape they come upstairs to see me in the bedroom....its very disconcerting. What's funny is, when I went to bed I was shivering and put the electic blanket on and put todays clean yard clothes under the covers with me to be warm for this morning:o but when the hogs visited and I took them back down I just went in the birthday suit and was ok. Thismorning ofcourse, I was freezing again.

neverdespairgirl

We had our heating on this morning for hte first time. It was nippy last night, and I thought it would be hard to get out of bed unless it was on (-: