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| :It has a calorific value of about 150 kJ/gm(much higher when compared to coal,etc.) but is too explosive[[User:Guru-45|Guru-45]] ([[User talk:Guru-45|talk]]) 14:24, 18 January 2013 (UTC) | | :It has a calorific value of about 150 kJ/gm(much higher when compared to coal,etc.) but is too explosive[[User:Guru-45|Guru-45]] ([[User talk:Guru-45|talk]]) 14:24, 18 January 2013 (UTC) |
| :That is for burning it I assume? But what if you use it as fuel in a fusion reactor? Or an H-Bomb for that matter? | | :That is for burning it I assume? But what if you use it as fuel in a fusion reactor? Or an H-Bomb for that matter? |
| + | The calorie standard is defined by burning. So comparison doesn't fit with the graph as written. [[User:DruidDriver|DruidDriver]] ([[User talk:DruidDriver|talk]]) 20:46, 24 January 2013 (UTC) |
| :is it really a parody? (well, probably arrow notation grows much more, here there is just a log log log etc) --[[User:.mau,|.mau.]] ([[User talk:.mau,|talk]]) 14:10, 18 January 2013 (UTC) | | :is it really a parody? (well, probably arrow notation grows much more, here there is just a log log log etc) --[[User:.mau,|.mau.]] ([[User talk:.mau,|talk]]) 14:10, 18 January 2013 (UTC) |
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− | The calorie standard is defined by burning. So comparison doesn't fit with the graph as written. [[User:DruidDriver|DruidDriver]] ([[User talk:DruidDriver|talk]]) 20:46, 24 January 2013 (UTC)
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| It's true that uranium has an extremely high energy density, which is of great importance for mobile power plants; however, nuclear fission has a lot of safety issues, especially for mobile power, which is why it is used only for stationary power plants and large military vessels, such as aircraft carriers and subs. | | It's true that uranium has an extremely high energy density, which is of great importance for mobile power plants; however, nuclear fission has a lot of safety issues, especially for mobile power, which is why it is used only for stationary power plants and large military vessels, such as aircraft carriers and subs. |
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| The algorithim is: | | The algorithim is: |
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− | KnuthPaperStack(N):
| + | KnuthPaperStack(N): |
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− | y = log10(N)/3818
| + | y = log10(N)/3818 |
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− | If y >= 25824
| + | If y >= 25824 |
− | Z = Z + 1
| + | Z = Z + 1 |
− | z = KnuthPaperStack(y)
| + | z = KnuthPaperStack(y) |
− | Return z,Z
| + | Return z,Z |
− | Else
| + | Else |
− | Return y,Z
| + | Return y,Z |
− | End if
| + | End if |
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| --[[User:Markozeta|Markozeta]] ([[User talk:Markozeta|talk]]) 15:25, 20 January 2013 (UTC) | | --[[User:Markozeta|Markozeta]] ([[User talk:Markozeta|talk]]) 15:25, 20 January 2013 (UTC) |
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| [[Special:Contributions/87.238.84.65|87.238.84.65]] 14:45, 28 January 2013 (UTC) Guest, 2nd time posting :) | | [[Special:Contributions/87.238.84.65|87.238.84.65]] 14:45, 28 January 2013 (UTC) Guest, 2nd time posting :) |
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− | Assumption #1) the graph is drawn on an 8.5 x 11 sheet of ordinary paper in landscape orientation.
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− | Assumption #2) the graph is drawn in normal (linear) scale.
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− | Assumption #3) Cueball is 6 feet tall.
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− | Trusting MSPaint with the conversions, I read the first four bars to have about 5 units (megajoules per kg) per pixel. 76 million units divided by 5 units per pixel is a 15.2 million pixel tall bar.
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− | Looking again to MSPaint, I read the 8.5" dimension of the paper to be about 193 pixels. 15.2 million pixels of graph bar divided by 193 pixels per page is 78756 pages.
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− | Looking above, I read that 100 pages is 1cm, so our stack is going to be 787.56cm tall.
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− | On this side of the pond, that's 310 inches, or about 25 feet.
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− | So, the stack Cueball is looking at is too short to house an accurately long enough bar....
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− | ...IF the stack's footprint's longer dimension is only 8.5 inches. While the original graph paper appears to be 8.5x11, the ribbon of paper continuing the bar does not appear to be segmented. Again looking at MSPaint, it would seem the ribbon is about 4.75" wide. The stack is clearly much longer than it is wide. If the stack is 30" long and 4.75" wide, the stack would be whittled down to just over 6 feet tall.
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− | So, making a gang load of assumptions, and scaling from an drawn image, it's reasonable to say the stack in the image could be accurate enough.
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− | The explanation's assumption above that the gasoline bar is 4cm tall makes the piece of paper 96.5cm (38") tall, and that's just not practical. Using the scale I've based my statements on makes the gasoline bar just about 9mm.
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− | -psychoboy[[Special:Contributions/70.164.66.64|70.164.66.64]] 19:57, 2 February 2013 (UTC)
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− | What is the energy density of gasoline if it undergoes nuclear fusion? {{unsigned ip|173.245.48.91}}
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− | This is similar to the iterated logarithm function, right? --[[Special:Contributions/199.27.128.192|199.27.128.192]] 21:28, 18 January 2015 (UTC)
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− | I actually had to present this chart when I was ten years old, but I needed to use a split level to save paper due to the theme of environmentalism.[[Special:Contributions/141.101.104.186|141.101.104.186]]
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− | The stated value of 76'000'000 MJ (76 Terajoules) per kg Uranium corresponds roughly to the energy released by the fission of U-235 nuclei of 202.5 MeV or 3.24·10-17 MJ per nucleus [[https://en.wikipedia.org/wiki/Nuclear_fission#Output]]. One kilogram of pure U-235 would release about 83 Terajoules. In a real nuclear power plant more energy is generated due to breeder reactions, so that per kg U-235 about 128 TJ are produced. One kilogram of natural uranium has about 0.71% U-235 and therefore the potential to produce about 910'000 MJ in a usual nuclear power plant. A fuel rod as used in a nuclear power plant (enriched to 3.5% U-235) has the potential to produce about 4.5 TJ. --[[Special:Contributions/162.158.150.231|162.158.150.231]] 01:19, 18 March 2016 (UTC)
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− | What if the number of iterations doesn't fit the room? [[Special:Contributions/141.101.80.74|141.101.80.74]] 21:25, 29 April 2016 (UTC)
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− | :Case 1: The original paper stack doesn't fit the room. --> Pin a paper to it showing how many iterations you need to write it out.
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− | :Case 2: The pinned paper stack doesn't fit the room. --> Pin a paper stack to THAT showing how many iterations you need to write it out.
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− | :Case 3: That pinned paper stack doesn't fit the room. --> Pin a paper stack onto that showing how many iterations you need to write it out.
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− | :etc.
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− | [[User:625571b7-aa66-4f98-ac5c-92464cfb4ed8|625571b7-aa66-4f98-ac5c-92464cfb4ed8]] ([[User talk:625571b7-aa66-4f98-ac5c-92464cfb4ed8|talk]]) 07:00, 8 March 2017 (UTC)
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