Huguenot Posted May 24, 2011 Share Posted May 24, 2011 Today's fascinating physics fact...Nuclear bombs generate their 'blast energy' according to Einstein's equation e=mc2 (energy released = mass x speed of light squared).So a 20 kiloton bomb (the size they dropped on Nagasaki) lost about 0.8 grams of mass - about the weight of a five pound note.So as you stroll into the pub tonight, it's worth considering that you're packing the equivalent of 5 or 6 nuclear bombs in your wallet.Scary eh? Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/ Share on other sites More sharing options...
Chick Posted May 24, 2011 Share Posted May 24, 2011 So clever. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-438929 Share on other sites More sharing options...
Jeremy Posted May 24, 2011 Share Posted May 24, 2011 I assume you arrived at your result by converting the Kiloton "TNT equivalent" to Joules. Sounds about right... according to Wikipedia, a max of 0.03% of the mass of the bomb is converted into "useful" energy. And those early bombs were presumably less efficient than modern ones. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-438937 Share on other sites More sharing options...
Huguenot Posted May 24, 2011 Author Share Posted May 24, 2011 Yeah. The really wierd thing is that although the bomb materials lose mass, they don't actually lose any material.This is because the 'mass' of an object isn't just defined by the particles it's made up of, but by the energy within them.A good example is water: water is made up of two hydrogen atoms and one oxygen atom. However, water (h2o) actually has lower mass than 2 x hydrogen and 1 x oxygen atoms, even though nothing has disappeared.As you've probably guessed, this is because they're in a lower 'energy state' - so energy is released when hydrogen and oxygen are combined to create water.This is how the Space Shuttle main engine works - it combines hydrogen and oxygen releasing the energy. Hence that big plume of 'smoke' out of the back isn't smoke at all - it's water.In a nuclear bomb the by products of nuclear fission have the same 'particles' that they had before: they just have lower mass.Freaky. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-438939 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 "Wikipedia trivia: if you take any article, click on the first link in the article text not in parentheses or italics, and then repeat, you will eventually end up at "Philosophy""*Wow, tried it on Blackbird and it worked.*from xkcd Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439154 Share on other sites More sharing options...
Laddy Muck Posted May 25, 2011 Share Posted May 25, 2011 Fascinating. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439159 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 ...and chewing gum. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439161 Share on other sites More sharing options...
Guest Posted May 25, 2011 Share Posted May 25, 2011 Thank goodness - only 5 posts before someone reduced it to a level I can understand. Bless you, Mockney. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439195 Share on other sites More sharing options...
david_carnell Posted May 25, 2011 Share Posted May 25, 2011 It took me 18 clicks to get from:NaftoruonNaftoruon is a village in the municipality of Osak?cə in the Lankaran Rayon of Azerbaijan - this was a random article selection.toProperty (Philosophy)In modern philosophy, mathematics, and logic, a property is an attribute of an objectIt's like an intelligent variation of Six Degree of Kevin Bacon. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439196 Share on other sites More sharing options...
Guest Posted May 25, 2011 Share Posted May 25, 2011 12 clicks from Plum to Property (Philosophy).Found a new 5-letter word along the way which I'm now longing to work into the 5-letter word thread. Bonus. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439199 Share on other sites More sharing options...
david_carnell Posted May 25, 2011 Share Posted May 25, 2011 Do you get points for most or fewest clicks? Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439223 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 most, 18 must be pretty good.Chewing gum was 16, Blackbird 13. Seems we have a target to beat people. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439228 Share on other sites More sharing options...
Loz Posted May 25, 2011 Share Posted May 25, 2011 david_carnell Wrote:-------------------------------------------------------> Do you get points for most or fewest clicks?Most, obviously. Else I bagsie 'philosophy' - 0 clicks. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439231 Share on other sites More sharing options...
david_carnell Posted May 25, 2011 Share Posted May 25, 2011 I got 18 again with Takanobu Otsubo (born 15 June 1976), the Japanese long-distance runner who specializes in the half marathon. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439232 Share on other sites More sharing options...
Loz Posted May 25, 2011 Share Posted May 25, 2011 Ironically Kevin Bacon -> Philosophy = 20 clicks, via "mammary glands" and "organ". And his middle name is 'Norwood'. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439235 Share on other sites More sharing options...
david_carnell Posted May 25, 2011 Share Posted May 25, 2011 I trump you with 23 clicks from Archbishop Alter High School, also known as Alter High School, a Catholic high school in Kettering, Ohio, United States.Via the United States and Taxonomy Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439236 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 Battle of the Alamo takes 20. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439237 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 BAh, trumped Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439238 Share on other sites More sharing options...
Loz Posted May 25, 2011 Share Posted May 25, 2011 DC - what the hell made you try that? Is that your old school? Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439240 Share on other sites More sharing options...
Salsaboy Posted May 25, 2011 Share Posted May 25, 2011 Handyman - got up to 26 before I realised it had got into a loop and the same pages kept coming up, none of them Philosophy. I think I beat it.>:D< Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439243 Share on other sites More sharing options...
reggie Posted May 25, 2011 Share Posted May 25, 2011 I have never thought of chemical reactions such as burning hydrogen as producing changes in mass so thankyou hugs for enlightening me.Though for the casual observer, producing water from oxygen and hydrogen is not a 'nuclear' reaction in the same vein as an atomic bomb. The changes in energy state are to do with electrons and not part of the nucleus.Agreed? Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439255 Share on other sites More sharing options...
mockney piers Posted May 25, 2011 Share Posted May 25, 2011 Nope, handyman was 13. Quickly hit the sciences and then you're doomed.The rule is first word not in parantheses or italics. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439256 Share on other sites More sharing options...
Jeremy Posted May 25, 2011 Share Posted May 25, 2011 reggie - a worthy post I'm sure, but to be blunt, nobody seems interested any more. The Wikipedia Philosophy thing is more fun. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439259 Share on other sites More sharing options...
david_carnell Posted May 25, 2011 Share Posted May 25, 2011 Loz Wrote:-------------------------------------------------------> DC - what the hell made you try that? Is that> your old school?Nah.....just click on the "Random Article" link. Makes life more fun. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439260 Share on other sites More sharing options...
Salsaboy Posted May 25, 2011 Share Posted May 25, 2011 mockney piers Wrote:-------------------------------------------------------> Nope, handyman was 13. Quickly hit the sciences> and then you're doomed.> > The rule is first word not in parantheses or> italics.Oh yeah, just seen where I went wrong. Clicked on 2nd word at one point. Bummer. Link to comment https://www.eastdulwichforum.co.uk/topic/17440-emc2/#findComment-439266 Share on other sites More sharing options...
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