DaveE's latest activity
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DaveE reacted to russ_watters's post in the thread How do people explore new ideas in physics? with
Like.
There's really no way around the fact that the barrier to entry (being educated in physics) is required for practical reasons. There's... -
DaveE reacted to .Scott's post in the thread I Could fast radio bursts be alien radar signals? with Like.
There are a lot of reasons to doubt that FRBs are deliberately engineered and fabricated. But their application for radar is especially...
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DaveE replied to the thread I Free fall of person in a sled to direct horizontal motion by atmospheric resistance.These specifications like glide ratio, climb rate, etc. all assume you are operating the aircraft to maximize that particular...
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I've never, ever seen any serious engineering work where just (school) education would suffice. It's always a long ride along senior...
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DaveE replied to the thread Working for defense company?.I used to. The security issues mentioned would depend entirely on what your role is at the company. They employ a whole bunch of people...
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DaveE replied to the thread Plumbing How to remove a seized toilet tank bolt?.A Dremel tool and an hour of patience. Yes, this is the last resort. I'll bet it's unnecessary.
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DaveE reacted to sophiecentaur's post in the thread Plumbing How to remove a seized toilet tank bolt? with Like.
. . . . and give it 24 hours to penetrate. The photo doesn't show a lot of rust so there can't be a lot sticking the threads. I trick...
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DaveE reacted to Borg's post in the thread Plumbing How to remove a seized toilet tank bolt? with Like.
Screw two nuts lightly together near the top. Put a wrench on the top one when you try to turn the butterfly fastener and it should bite...
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DaveE reacted to Baluncore's post in the thread Plumbing How to remove a seized toilet tank bolt? with Like.
The reasoning is: A flat blade screwdriver is not the best for applying torque. You need a temporary head on the threaded fastener, to...
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DaveE replied to the thread Plumbing How to remove a seized toilet tank bolt?.1) Liquid wrench, or an equivalent penetrating oil (WD40 isn't one, but it's not a bad second choice), while you're reading our...
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DaveE replied to the thread Classical How is Jackson’s Electrodynamics taught during undergraduate?.Same at Caltech in the late 1970s, but I think EM was just Jackson.
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DaveE replied to the thread Electronic (6v) Lamp failed - troubleshooting.Yes, our first step in troubleshooting PCBs was always a careful visual inspection. It will be obvious if a wire was supposed to be...
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DaveE replied to the thread Electronic (6v) Lamp failed - troubleshooting.Or it might not. Here's a troubleshooting tip. If a device used to work but now doesn't, and it didn't ever have a wire attached to a...
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DaveE replied to the thread Construction Water sealing a large corrugated roof - after-the-fact.Oh, now I get it. I thought it was the long seams. Duh. I hereby completely rescind everything I said about tape. That would be nearly...
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DaveE replied to the thread Construction Water sealing a large corrugated roof - after-the-fact.That's one reason I like my butyl tape idea. At least the edges will be straight (sort of). Still, if you're really careful with the...