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this post was submitted on 09 Apr 2025
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Science Memes
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Copy pasta without source. Book! https://xkcd.com/1162/
*Boo
(But having a book instead is always nice.)
I choose to believe it was meant as a warning, because GP is going to yeet a book at your head. But with a fair warning.
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I always use “book” as an insult. Especially since my phone autocorrect was updated…
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Uranium generates that energy by fission. The hydrogen in sugar could generate huge amounts of energy if fused.
How much more energy would you get if you fused uranium?
Using the rule of thumb, anything heavier than iron requires energy input to fuse. So you lose energy fusing uranium.
Serious answer: A huge negative amount. Anything above iron requires energy to fuse (which is why it produces energy from fission.) and I'm pretty sure nothing with 184 protons could be stable enough to count as being produced - the nuclei would be more smashed apart than merging at that point.
Ask Hiroshima and Nagasaki.
In alphabetical order.
Edit: oops, those are fission, my bad
Those are fission. Fusion bombs don't fuse uranium. They use a fission bomb to fuse Lithium.
Fusion bombs use a fission bomb to fuse Hydrogen, which is why they're called H-bombs.
Look at all these nuclear scientists on Lemmy.
Oh, they do, but not as the primary or secondary. You can wrap depleated uranium around the core to capture fast neutrons that are leftover from the rest of the process. Changing the number of layers is how you can dial in a desired yield.
Damnit, you're right and I'm wrong!
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That's fissed, not fused.
I stand corrected, because I done forgetted.
Whilst I get your point, their point is still valid in the sense that you just can't extract that energy from gasoline in a more efficient manner than just burning it. For practical purposes, gasoline truly is that much less energy dense.
For comparison:
- Chemical combustion of uranium: ~4.7 MJ/kg
- Nuclear fission of uranium-235: ~83.14 TJ/kg (or $ 83.14 \times 10^6 , \text{MJ/kg} $)
Do you have a Lemmy client that supports mathematical functions?
With ollama, having smart local bots for your lemmy instance should be easy
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In theory, yes. In practice, of those two only fission is currently viable.
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Wrong. You can't scale logs much. logs are 16 MJ/kg
Yes boss, I did work out the dynamic range of that log amplifier we wanted to use in our next product's sensor PCB, it's 80dB.
The results are over here. (points to a roll of A-4 paper)
It has 40 data points and only took me 1 week, 10 pencils, and 20 erasers to plot the chart. Yeah I can present it, it'll take me 10 minutes to roll it out, pin it down, and fetch the A-frame ladder.
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