Recent content by johntpl
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Undergrad How does a photon travel?
It means ‘position’ and ‘nowhere’ don’t apply.- johntpl
- Post #6
- Forum: Quantum Physics
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Collection of Lame Jokes
Be the meme you’d like to see in the world…- johntpl
- Post #18,613
- Forum: Fun, Photos and Games
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Why can't we simply use an atomic bomb to get the fusion working?
We’ve all missed the obvious solution: build a star! What could be easier…..- johntpl
- Post #17
- Forum: Nuclear Engineering
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Collection of Lame Jokes
But not before doing a cavity search…- johntpl
- Post #17,398
- Forum: Fun, Photos and Games
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Collection of Lame Jokes
Ancient Sumerian is full of puns and wordplay. I expect something was lost in translation 🙂- johntpl
- Post #16,781
- Forum: Fun, Photos and Games
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Homo Naledi: 5 Yr Update & New Findings (2021)
There is a very good doc on Netflix, Cave of Bones, that presents their findings and provides extensive footage of how the deepest chamber is accessed. They make passing reference to sceptical responses. My impression is that we are watching the usual and appropriate give and take of researchers...- johntpl
- Post #12
- Forum: Biology and Medical
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Collection of Lame Jokes
And the Cretan beside her in the passenger seat repeating, ‘I told you, the light is green!’- johntpl
- Post #15,976
- Forum: Fun, Photos and Games
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Misc. Making a 3D topo map of my town - looking for techniques
Hi, DaveC, A million years ago (give or take) I made architectural models and had to do this very often. We used rigid urethane foam. It’s available in different densities. We used lighter foam for smoothed contours, heavier if left stepped. Doing this by hand is tedious and very messy-a lot...- johntpl
- Post #2
- Forum: DIY Projects
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High School Real world problem - Child's toy engine
These motors, known as ‘can’ motors, are very standardized. They are categorized by size and voltage. Measure the old motor and determine the likely voltage by counting the batteries. The trick will be reconnecting the new motor-some soldering will likely be required.- johntpl
- Post #7
- Forum: Electromagnetism