Interesting Items...

[Deleted member 473]

But my homepage looks like this:

https://speeddial2.com/bookmarks

 

[Deleted member 473]

The spread of the plague. Sound familiar? A village called Eyam near here isolated itself to keep the plague from spreading, but these days we merrily let people jet around the world.

http://historymedren.about.com/od/theblackdeath/ig/Spread-of-the-Black-Death/ms1346eura.htm

 

[Deleted member 473]

"Internet trolls face longer sentences"

BBC news app.

That's harsh on them. They already have trouble stringing five words together.

 

[gomezz]

Does it include the spelling and grammar nazis?

 

[kevindickinson]

I think it's Nazis not nazis


Sent from here using a computing device.

 

[gomezz]

In the same way as it it is Hoovers not hoovers (actually should be Spanglers)?

 

[kevindickinson]

Well I never! Until just now I had never heard of Spangler.

From now on I'll be Spangling the carpet!


Sent from here using a computing device.

 

[Trev]

That'll make a mess!

 

[Deleted member 473]

Vacuum cleaners don't really create a vacuum.

 

[kevindickinson]

Vacuum cleaners don't really create a vacuum.

Surely they would if connected to a air tight container?


Sent from here using a computing device.

 

[Black Hole]

Nope. Not nearly efficient enough.

 

[kevindickinson]

I'm sure we did something like this in Physics at school getting two domes to stick together by sucking the air out. Was that not a proper vacuumed then?


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[Trev]

No, it would have been a partial vacuum. A vacuum is the total absence of air and other gaseous stuff.

 

[Black Hole]

Hoovers simply use a centrifugal blower, which achieves a high flow rate but has nothing to prevent a back-flow if the pressure difference across the blower becomes enough to oppose the fan.

Laboratory vacuum pumps are proper pumps rather than blowers, they have a system of pistons and valves so that a volume of gas is removed from one side and pushed out at the other. These have a much lower flow rate than a hoover blower, but work down to a much higher pressure difference. They stop working when the valves and pistons can no longer seal adequately or the working volume simply isn't capturing any more gas molecules.

Ultra-high vacuums are created using exotic molecule capturing processes which require a pretty good vacuum in the first place before they start working.

 

[prpr]

If microsoft.com made vacuum cleaners, it'd be the only they made that didn't suck.

(Well, somebody had to...)

 

[kevindickinson]

And they would require a license to use and not be supported after 3 years.

I'd go for the apple.com vacuumed cleaner. Sleek with no buttons to press. Accessories to make it useful are a bit expensive though.

 

[Trev]

@prpr And just what makes you think that it won't suck. Is this based on previous experience?
@Kevin re. Apple vacuum cleaners. It will bend the first time you use it.

 

[Black Hole]

Apple already make hoovers. They're branded Dyson.

 

[gomezz]

No, it would have been a partial vacuum. A vacuum is the total absence of air and other gaseous stuff.

Is not a partial vacuum as much of an oxymoron as a little bit pregnant? A very low pressure area surely?

 

[Trev]

Damn and blast. Hoisted by my own petard yet again. I suppose it's similar to digging half a hole. And you know what they say about what to do when you're in a hole.