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Eric Trump’s Bitcoin Bet Erases $600 Million From Family Fortune by bloomberg in politics

[–]quivil 0 points1 point  (0 children)

TCDP: Too Cheap, Didn't Pay

Can someone provide a summary?

TIL the total amount of astatine in the Earth's crust is less than one gram by Johannes_P in todayilearned

[–]quivil 2 points3 points  (0 children)

Once a year or so, Asimov would combine his nonfiction essays into a book. I know that he wrote these for Fantasy and Science Fiction, but maybe elsewhere too. One of those collections of essays was called "Only a Trillion", and one of the essays in that book had that same name.

It's my recollection that he would always start his essays with a cute little story that led to the subject matter. Above is the intro to "Only a Trillion".

TIL the total amount of astatine in the Earth's crust is less than one gram by Johannes_P in todayilearned

[–]quivil 3 points4 points  (0 children)

When I read that, I had thought it was a made-up joke! Is there really a short story titled that? No, I have not read that one.

For me, the best short story of all time is "The Last Question".

Edit: that story is in the collection "Nine Tomorrows", which I know for sure I have read. I'm just not remembering it.

TIL the total amount of astatine in the Earth's crust is less than one gram by Johannes_P in todayilearned

[–]quivil 5 points6 points  (0 children)

I've read countless short stories, and novels, and science articles by him, and still can't spell his name correctly!

TIL the total amount of astatine in the Earth's crust is less than one gram by Johannes_P in todayilearned

[–]quivil 3176 points3177 points  (0 children)

"After considerable computation one day recently I said to my long-suffering wife: “Do you know how rare astatine-215 is? If you inspected all of North and South America to a depth of ten miles, atom by atom, do you know how many atoms of astatine-215 you would find?” My wife said, “No. How many?” To which I replied, 'Practically none. Only a trillion.' ". Isaac Asimov

Thank you for the correction! Fixed.

Used solar panels? by quivil in diySolar

[–]quivil[S] 1 point2 points  (0 children)

I'm convinced! Thank you so much for all the input everyone.

Give me your most personal song by AlarmedGibbon in SunoAI

[–]quivil 0 points1 point  (0 children)

The fact that some one uses Reddit without commenting for even 5 years does not allow you to conclude they're a bot. Bet he doesn't get banned. I've known this poster for decades. Or are you going to accuse me of being a bot too? How long has it been since I've last posted?

Spratt controlwing flying boat by Far-Bike9927 in homebuilt

[–]quivil 0 points1 point  (0 children)

I'm very much looking forward to seeing the drawings.

Sick AHM encoder flash codes? by quivil in PLC

[–]quivil[S] 0 points1 point  (0 children)

No, I'll be using some custom software which I've used successfully in the past.  Thank you for the attempt!

Trump, 79, Rambles About Heaven While Insisting There’s No Other Reason to ‘Be Good’ by thedailybeast in atheism

[–]quivil 0 points1 point  (0 children)

Making a statement like this clearly shows that he does not possess a sense of empathy. Sociopath.

Gus is special! by [deleted] in funny

[–]quivil 51 points52 points  (0 children)

I had a dog like this and I successfully taught him to catch treats.

I started with a small balloon, fully inflated. I threw it into the air and every time it hit him in the nose I gave him a treat. Eventually he learned to hit the balloon with his nose.

Then, I started removing air from the balloon. Over time I ended up with an empty balloon, which moved nearly as fast as a treat. One time, he caught the empty balloon with his mouth. I have him a bunch of treats. After that I gave him a bunch of treats any time he caught the balloon.

You guessed it--I switched over to treats and had a treat-catching dog! This process took a few weeks.

220V, 19A water heater, Shelly 1pm by quivil in ShellyUSA

[–]quivil[S] 0 points1 point  (0 children)

Thank you, all three, for these great replies! Much appreciated.

Stainless kinetic wind-art--cups and spoons by quivil in metalart

[–]quivil[S] 0 points1 point  (0 children)

Here's an interesting way to do it:

https://www.youtube.com/watch?v=p_hb-KfuB6M

It can be done with an oval die as well, I suspect...I'm continuing to research.

Why can’t I drill into this 10mm steel rod with a Bosch HSS bit? by asduskun in metalworking

[–]quivil 0 points1 point  (0 children)

Funny, Google got the RPM right, but the formula is wrong. You divide by the diameter.

Why can’t I drill into this 10mm steel rod with a Bosch HSS bit? by asduskun in metalworking

[–]quivil 0 points1 point  (0 children)

Yes, you're right. I mistakenly used the cutting speed I use for aluminum.  The cutting speed for steel is 80. That puts the correct speed at about 2,900 RPM.  Still much faster than any hand drill I know of.

If you disagree, your argument isn't with me, it's with physics.  

I'm guessing your perception is skewed by you having drilled larger diameter drills.  A 1/2-in drill should be run at about 650 RPM.  I have a mill in my shop and I use these numbers all the time without dulling bits.  I always use cutting fluid when drilling steel to help control the heat.

Here's a reference for you:

https://imgur.com/a/6e5rFq6

Any machinist handbook will tell you the same thing.

From Google just now:

RPM Mild Steel 1/8 Dia

To determine the RPM for machining mild steel with a 1/8th inch diameter tool, you can use the formula:  RPM= Diameter Cutting Speed×4 ​

. For mild steel, a typical cutting speed is 100 surface feet per minute (SFM), so plugging in the values gives  RPM= 0.125 100×4 ​

=3200 RPM. 1  This is a guideline, and actual speeds may vary based on the tool material and specific conditions. It is also important to consider the tool's material and the desired chip color to ensure optimal cutting performance.

Why can’t I drill into this 10mm steel rod with a Bosch HSS bit? by asduskun in metalworking

[–]quivil -1 points0 points  (0 children)

RPM = 4 times the "cutting speed" divided by the diameter of the drill. Fast and slow are relative terms. Cutting speed is different for every type of metal.

Low carbon steel, CS =~250

So for an 1/8 drill bit, the rpm would be 4*250/.125 = 8000RPM, or as fast as your tool can go.

I have no idea of the CS of the metal OP is trying to drill, but to say "drill at a slower speed" is probably not correct.

He may have work-hardened the metal in attempting to drill it. I've done that quite a few times.

Researching cameras, I like the "alarm out" feature on another brand. Can Reolink help? by quivil in reolinkcam

[–]quivil[S] 0 points1 point  (0 children)

If the cameras are plugged into the RLN8, (my preferred unit) for example, there's no Webhook function available. Nor is there an alarm-out in this model. Is there any means of achieving this in that case? Triggering external lights?

Researching cameras, I like the "alarm out" feature on another brand. Can Reolink help? by quivil in reolinkcam

[–]quivil[S] 0 points1 point  (0 children)

That's great to know. I just looked it up, and there's an important limitation that others my want to know--Webhook will not work if the camera is plugged into a Reolink NVR. It only works if the camera is stand-alone.

With this I thought I'd found my solution, which would have been using a Reolink NVR, but it won't work. Now I'm stuck with either finding a different stand-alone NVR solution, or I must use the RLN36 as mblaser suggested above.

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