Today I Learned

Old Jul 20th 2017, 5:11 am
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Default Today I Learned

New idea, just put something you learned today.... Good or bad.

I'll start with two (admittedly one was yesterday but hey ho.
The reason the metro and Tram have windscreen wipers on when they're driverless is because there is a camera inside the "cab" that the operators can see from their control place.
Geiger counters and the like that have to be very sensitive to radiation, have to be made out of stuff called 'Low background steel', steel made before the first atomic bombs were detonated.
All steel after that will be very slightly radioactive.
They use steel from WW1 battleships don't you know.
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Old Jul 20th 2017, 7:30 am
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Default Re: Today I Learned

Not sure I have learned anything today, yet. I hope I do.

I met a new colleague in Australia if that counts, we had a video call and I will keep in touch and help him with some of the work down under, which is always cool.
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Old Jul 20th 2017, 8:00 am
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i'm with SCAMP....not learned anything new today, yet!
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Old Jul 20th 2017, 8:08 am
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Default Re: Today I Learned

Originally Posted by mission View Post
i'm with SCAMP....not learned anything new today, yet!
My wife has learned that she can rescue "seized" melted chocolate by adding spoonfuls of hot water and stirring it in until the chocolate returns to its melted state
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Old Jul 20th 2017, 3:03 pm
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Default Re: Today I Learned

Well I learnt that chocolate has seizures!!
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Old Jul 21st 2017, 6:37 am
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Default Re: Today I Learned

Originally Posted by Dubaiexile View Post
Well I learnt that chocolate has seizures!!
Rescuing the chocolate from its seizure was well worth it - the chocolate mousse was delicious
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Old Jul 21st 2017, 6:55 am
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Default Re: Today I Learned

Geiger counters and the like that have to be very sensitive to radiation, have to be made out of stuff called 'Low background steel', steel made before the first atomic bombs were detonated.
All steel after that will be very slightly radioactive.
They use steel from WW1 battleships don't you know.
Do the humans using Geiger Counters also have to predate atomic detonations?
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Old Jul 21st 2017, 5:30 pm
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Default Re: Today I Learned

Originally Posted by Expatrick View Post
Do the humans using Geiger Counters also have to predate atomic detonations?
I've not learned that today.

Sorry.
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Old Jul 21st 2017, 5:42 pm
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Default Re: Today I Learned

Originally Posted by Expatrick View Post
Do the humans using Geiger Counters also have to predate atomic detonations? .....
Coal fired powerstations release more radioactivity into the atmosphere than nuclear stations (that are operating properly), because of the uranium present in coal.
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Old Jul 22nd 2017, 5:41 am
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Default Re: Today I Learned

Originally Posted by IKnowNothing View Post
New idea, just put something you learned today.... Good or bad.

I'll start with two (admittedly one was yesterday but hey ho.
The reason the metro and Tram have windscreen wipers on when they're driverless is because there is a camera inside the "cab" that the operators can see from their control place.
Geiger counters and the like that have to be very sensitive to radiation, have to be made out of stuff called 'Low background steel', steel made before the first atomic bombs were detonated.
All steel after that will be very slightly radioactive.
They use steel from WW1 battleships don't you know.
That doesn't sound right. Steel is an alloy of carbon, Iron and a bunch of other elements. New steel is made everyday , so why would it be radioactive
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Old Jul 22nd 2017, 6:02 am
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Default Re: Today I Learned

Originally Posted by Boomhauer View Post
That doesn't sound right. Steel is an alloy of carbon, Iron and a bunch of other elements. New steel is made everyday , so why would it be radioactive

Well I was dubious as well but here is the answer;

https://en.wikipedia.org/wiki/Low-background_steel
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Old Jul 22nd 2017, 11:39 am
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Default Re: Today I Learned

Originally Posted by Boomhauer View Post
That doesn't sound right. Steel is an alloy of carbon, Iron and a bunch of other elements. New steel is made everyday , so why would it be radioactive? .....
Because a large proportion of steel "made" today is recycled scrap, and unless someone starts purifying iron with an electrolytic process, as is done with copper and aluminium (but which is cost prohibitive for iron), then the recycled iron remains contaminated.

Per the article linked by Dubaiexile, new iron made from only iron ore would now be nearly as good as the pre-nuclear recycled scrap.
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Old Jul 22nd 2017, 1:41 pm
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Default Re: Today I Learned

Today I learned that I really, truly hate the kind of music 17 year olds listen to. Next door neighbours are having a 17th birthday party for their daughter and the DJ may as well be in my lounge room
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Old Jul 22nd 2017, 1:46 pm
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Default Re: Today I Learned

Originally Posted by Dorothy View Post
Today I learned that I really, truly hate the kind of music 17 year olds listen to. Next door neighbours are having a 17th birthday party for their daughter and the DJ may as well be in my lounge room. ....
My neighbours are members of some sort of Christian sect who home-school their kids. Their eldest must be almost 18 now - and he took up drumming a couple of years ago (how the rest of the family put up wjth the noise, I have no idea! ). His buddies come over and they jam to AC/DC, Zeppelin, Skynyrd etc.
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Old Jul 23rd 2017, 7:20 am
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Default Re: Today I Learned

I've learned that when you sneeze, your heart stops for a second hence saying Humm Dillilah or Bless You
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