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Search: Posts Made By: Dr Sardonicus
Forum: Lounge 2020-10-20, 14:30
Replies: 66
Views: 1,555
Posted By Dr Sardonicus
The (approximate) molecular weight of the...

The (approximate) molecular weight of the asphyxiant CO is 12 + 16 = 28, which is the same as the 14 + 14 of N2, which is by far the largest component of air. (The next-largest is oxygen, with a...
Forum: Lounge 2020-10-19, 23:27
Replies: 1,124
Views: 52,577
Posted By Dr Sardonicus
Speaking of ready-made scapegoats...

From a Monday call to campaign staff -- knowing members of the press were on the line -- as quoted, e.g. here...
Forum: Lounge 2020-10-19, 19:20
Replies: 126
Views: 10,734
Posted By Dr Sardonicus
Owl boards helicopter fighting California...

Owl boards helicopter fighting California wildfire (https://www.upi.com/Odd_News/2020/10/16/Owl-boards-helicopter-fighting-California-wildfire/9711602880111/)
...
Forum: Lounge 2020-10-19, 19:08
Replies: 1,304
Views: 70,840
Posted By Dr Sardonicus
I have no objection to eating roadkill. I was...

I have no objection to eating roadkill. I was merely pointing out that "road mortality" wasn't all that eco-friendly.

There is one caveat, at least here in the US. Some states require that, if...
Forum: Lounge 2020-10-19, 14:16
Replies: 1,304
Views: 70,840
Posted By Dr Sardonicus
I wouldn't be so sure of that. According to,...

I wouldn't be so sure of that. According to, e.g. the 2004 article about how roads affect the ecology, The Ecology of Roadkill (https://www.discovermagazine.com/environment/the-ecology-of-roadkill)...
Forum: Lounge 2020-10-19, 11:36
Replies: 1,124
Views: 52,577
Posted By Dr Sardonicus
I don't see why. The folks here seem to have...

I don't see why. The folks here seem to have zeroed in on the fact that the Great Barrington Declaration "proposes" a facile phrase -- "focused protection" -- without any real idea of how to carry...
Forum: Lounge 2020-10-19, 01:31
Replies: 1,124
Views: 52,577
Posted By Dr Sardonicus
The Great Barrington Declaration...

The Great Barrington Declaration (https://gbdeclaration.org/)
Forum: Lounge 2020-10-18, 20:53
Replies: 4,087
Views: 251,872
Posted By Dr Sardonicus
Also see last link in this post...

Also see last link in this post (https://www.mersenneforum.org/showpost.php?p=560081&postcount=2825) in Science & Technology, Official "Science News" Thread
Forum: Lounge 2020-10-17, 22:53
Replies: 4,087
Views: 251,872
Posted By Dr Sardonicus
The plight of Nelson the Norfolk Terrier reminded...

The plight of Nelson the Norfolk Terrier reminded me of a song I heard many years ago. I was prompted to look it up.

The rendition (on YouTube) I'd Like to be a Cowgirl...
Forum: Lounge 2020-10-17, 21:55
Replies: 441
Views: 17,418
Posted By Dr Sardonicus
You guess correctly. Go to the head of the...

You guess correctly. Go to the head of the class!

Your offering 3,560,600,696,674 has AFAIK defied analysis so far (I haven't figured out why it is special), so you're current.
Forum: Lounge 2020-10-17, 13:55
Replies: 441
Views: 17,418
Posted By Dr Sardonicus
Nice try. Alas, the stated fact doesn't make 37...

Nice try. Alas, the stated fact doesn't make 37 "special." Every prime p other than 2 or 5 divides some repunit. "Largest prime factor of smallest composite decimal repdigit" is rather contrived. ...
Forum: Number Theory Discussion Group 2020-10-17, 13:37
Replies: 3
Views: 109
Posted By Dr Sardonicus
The overall result about the computation has...

The overall result about the computation has already been posted. It's comparable to a gcd computation.

The following pertains to the specific case at hand.

Apart from the individual factors,...
Forum: Puzzles 2020-10-16, 19:24
Replies: 32
Views: 641
Posted By Dr Sardonicus
So you did, and so I did. :blush: Hmm. The...

So you did, and so I did. :blush:

Hmm. The question of what starting values give bounded sequences is more interesting than I thought!
Forum: Lounge 2020-10-16, 19:20
Replies: 1,304
Views: 70,840
Posted By Dr Sardonicus
Big ag animals, huh? Let's see. Cows. Pigs. ...

Big ag animals, huh? Let's see. Cows. Pigs. Sheep. Chickens. A lot of biomass to be sure, but four is not a lot of species. You might enjoy reading A Statue for Father by Isaac Asimov.
...
Forum: Lounge 2020-10-16, 12:41
Replies: 1,304
Views: 70,840
Posted By Dr Sardonicus
Wasn't that the behaviour that brought humans...

Wasn't that the behaviour that brought humans first HIV and now Covid-19?[/QUOTE]We should also embrace and be proud of the slaughter of large animals in order to mine their corpses for body parts...
Forum: Puzzles 2020-10-16, 12:22
Replies: 32
Views: 641
Posted By Dr Sardonicus
Yes, ten is not a decimal digit. Another...

Yes, ten is not a decimal digit.

Another possibility is to interpret a sum of 10 as 1,0.

This is precisely why I asked Uncwilly. It was his rule, so it's his call on what to do when the rule...
Forum: Miscellaneous Math 2020-10-16, 12:13
Replies: 17
Views: 3,913
Posted By Dr Sardonicus
:dnftt:

:dnftt:
Forum: Puzzles 2020-10-16, 11:52
Replies: 32
Views: 641
Posted By Dr Sardonicus
No, Uncwilly gave the rule: Add the number of...

No, Uncwilly gave the rule: Add the number of letters in the (English) names for two consecutive digits to get the next digit.

This would appear to be problematic when you start with 1, 3. Hence...
Forum: Soap Box 2020-10-16, 11:42
Replies: 1,338
Views: 57,245
Posted By Dr Sardonicus
White House puts 'politicals' at CDC to try to...

White House puts 'politicals' at CDC to try to control info (https://apnews.com/article/election-2020-virus-outbreak-pandemics-public-health-new-york-e321f4c9098b4db4dd6b1eda76a5179e)
Forum: Puzzles 2020-10-16, 00:32
Replies: 32
Views: 641
Posted By Dr Sardonicus
I asked you first.

I asked you first.
Forum: Lounge 2020-10-15, 21:47
Replies: 19
Views: 414
Posted By Dr Sardonicus
Ah, an insurance company trying to weasel out of...

Ah, an insurance company trying to weasel out of paying a claim. I've heard of some bad cases here in the USA, but this one sounds it's got them all beat. The cases I've heard of have involved some...
Forum: Lounge 2020-10-15, 18:57
Replies: 19
Views: 414
Posted By Dr Sardonicus
Forgive my obtuseness, but I can't understand why...

Forgive my obtuseness, but I can't understand why (1) this need for witness and "solving the case" has only arisen four years after the fact. Here in the USA there is a thing called a "statute of...
Forum: Lounge 2020-10-15, 16:27
Replies: 441
Views: 17,418
Posted By Dr Sardonicus
It is the first number of the form p# + 1 which...

It is the first number of the form p# + 1 which is composite.

2 + 1 = 3, 2*3 + 1 = 7, 2*3*5 + 1 = 31, 2*3*5*7 + 1 = 211, and 2*3*5*7*11 +1 = 2311 are all prime, but 2*3*5*7*11*13 + 1 = 30031 is...
Forum: Puzzles 2020-10-15, 15:28
Replies: 32
Views: 641
Posted By Dr Sardonicus
What about the sequence that begins 1, 3, ...?

What about the sequence that begins 1, 3, ...?
Forum: Math 2020-10-15, 14:04
Replies: 12
Views: 434
Posted By Dr Sardonicus
You don't know the laws of exponents? xa *...

You don't know the laws of exponents?

xa * xb = xa+b

(xa)b = xa*b

The first law is initially proven for positive integers a and b; repeated application gives the second law.

Both laws can...
Showing results 1 to 25 of 1000

 
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