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16777 threads, 323203 comments
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12/05/2021
by Trees4Life
Could any US residents tell me what is going on in this photo of a US roadway that I grabbed from a movie?
In the screenshot below, the two lanes to...
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11/30/2021
by garth
If oxygen on our planet is the production of vegetation and marine microbes to some extent in the greater part. where did the oxygen in water come fro...
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11/28/2021
by Amberlia
VOOC is a technology which allows to charge your phone at very fast speed.several brands like Realme, OPPO and OnePlus uses this technology. But OnePl...
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11/28/2021
by lyn
We all know that this is the backside of a General N-141me.
The front just has a bunch of marks and numbers.
What is the purpose of the groove in...
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2110 threads, 4291 comments
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737 threads, 12527 comments
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See all Blog Entries
Section Blogs
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7 blog entries, 14 comments
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11/21/2021
In recent weeks we’ve talked about eliminating political discussions, reporting things to moderators and also rating threads and comments.
If e...
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11/20/2021
This is CR4: Moderator justice
The moderators and administrators of CR4 are employees of Globalspec, and [a small] part of our job is to keep CR4 run...
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406 blog entries, 30203 comments
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11/30/2021
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10/31/2021
Four dogs are placed in opposite corners of a 1 mile wide square.
These dogs are fast. 30 mph fast. And they are stamina freaks.
At their trainer's...
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1 blog entries, 7 comments
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02/21/2021
by ahorner_22
It’s no secret that 2020 was a tough year. People experienced challenges they’ve never experienced before. For anyone running an essential...
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Other Blog Entries of Interest
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10/04/2020
posted in Relativity and Cosmology
by Jorrie
When I first heard that there is no easy exact formula for the circumference of the standard ellipse, I found it hard to believe. I had already learne...
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08/24/2020
posted in Relativity and Cosmology
by Jorrie
In my prior Blog post on the Einstein equivalence principle, I have not identified important values, like the mass of the black hole, real distances a...
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08/17/2020
posted in Relativity and Cosmology
by Jorrie
One day after Alice's arrival at Deep-2, she and Dot sat down for the change of shift briefing - recall that Dot must soon return for Home leave. Whil...
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08/11/2020
posted in Relativity and Cosmology
by Jorrie
This is a fanciful little scenario for 'flexing the muscles' of acceleration in space-propertime a little and so giving a better intuitive feel for th...
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08/07/2020
posted in Relativity and Cosmology
by Jorrie
I have introduced the idea of Epstein Space-Propertime Diagrams (ESPD) in my previous Blog post. To refresh, here is the ESPD's structural relationshi...
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