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Topic: Interesting Things YOU Likely Don't Know

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CWSooner

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Re: Interesting Things YOU Likely Don't Know
« Reply #28 on: August 13, 2019, 09:55:10 AM »
Quote from: Cincydawg on August 13, 2019, 07:04:19 AM
I presume you know, right?  The sailing ships would calculate speed using a knotted rope lain along side the ship in the water to get "water speed".  The knots were separated by a standard length and a sailor would count as they passed it, one knot, two knots, etc.
Yes, I mentioned that in my response upthread to your statement that the term "knots" derives from lat and long.
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GopherRock

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Re: Interesting Things YOU Likely Don't Know
« Reply #29 on: August 13, 2019, 09:56:54 AM »
Strange. I thought that the term knot, when used in this context, was a bastardized version of nautical, not the knot-in-rope line. 
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CWSooner

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Re: Interesting Things YOU Likely Don't Know
« Reply #30 on: August 13, 2019, 10:15:57 AM »
Quote from: GopherRock on August 13, 2019, 09:56:54 AM
Strange. I thought that the term knot, when used in this context, was a bastardized version of nautical, not the knot-in-rope line.
That's the other story you get, as I also mentioned upthread.
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FearlessF

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Re: Interesting Things YOU Likely Don't Know
« Reply #31 on: August 13, 2019, 10:19:04 AM »
Quote from: GopherRock on August 13, 2019, 09:56:54 AM
Strange. I thought that the term knot, when used in this context, was a bastardized version of nautical, not the knot-in-rope line.
apparently its both
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Cincydawg

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Re: Interesting Things YOU Likely Don't Know
« Reply #32 on: August 13, 2019, 10:55:11 AM »
The nautical unit of measure of speed (1630s) is from the practice of attaching knotted string to the log line at equal distances (see log (n.2)). The ship's speed can be measured by the number of knots that play out while the sand glass is running.

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The distance between the knots on the log-line should contain 1/120 of a mile, supposing the glass to run exactly half a minute. [Jorge Juan and Antonio de Ulloa, "A Voyage to South America" 1760]

Hence the word knot came also to be used as the equivalent of a nautical mile (in pre-World War II use in U.S. and Britain, about 6,080 feet). A speed of 10 knots will cover ten nautical miles in an hour (equivalent to a land speed of about 11.5 mph).


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MrNubbz

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Re: Interesting Things YOU Likely Don't Know
« Reply #33 on: August 13, 2019, 02:07:08 PM »
Quote from: GopherRock on August 13, 2019, 09:56:54 AM
Strange. I thought that the term knot, when used in this context, was a bastardized version of nautical, not the knot-in-rope line.
Same-same
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MrNubbz

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Re: Interesting Things YOU Likely Don't Know
« Reply #34 on: August 13, 2019, 02:09:48 PM »
Quote from: Cincydawg on August 13, 2019, 10:55:11 AM
The nautical unit of measure of speed (1630s) is from the practice of attaching knotted string to the log line at equal distances (see log (n.2)). The ship's speed can be measured by the number of knots that play out while the sand glass is running.

Hence the word knot came also to be used as the equivalent of a nautical mile (in pre-World War II use in U.S. and Britain, about 6,080 feet). A speed of 10 knots will cover ten nautical miles in an hour (equivalent to a land speed of about 11.5 mph).
That's all good and fine wind/weather/waves would factor into that.So kind of a shaky method of measurement
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utee94

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Re: Interesting Things YOU Likely Don't Know
« Reply #35 on: August 13, 2019, 02:15:01 PM »
Quote from: MarqHusker on August 12, 2019, 10:28:41 PM
Investors cannot actually invest in an index, ex. S&P 500.  Instead you are investing in investment vehicles that attempt to track a particular index.  YMMV.

You're saying I can't invest in the common stocks of all of the 505 companies that comprise the S&P 500?  Because I'm not sure you're right about that... ;)

If I did such a thing, then I would effectively be investing in the index.

Of course, what should the contribution percentage of the investment in each company be?  Would it be weighted?  Should it be related to MCAP?  Some common business multiple?  I'd have to think on how I would approach that.
« Last Edit: August 13, 2019, 02:38:37 PM by utee94 »
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CWSooner

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Re: Interesting Things YOU Likely Don't Know
« Reply #36 on: August 13, 2019, 03:06:20 PM »
Quote from: MrNubbz on August 13, 2019, 02:09:48 PM
That's all good and fine wind/weather/waves would factor into that.So kind of a shaky method of measurement
It's just a measure of speed through the water, like airspeed indicators just measure speed through the air.  Water currents and wind of course change how movement through the media results in movement relative to the geographic grid.
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betarhoalphadelta

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Re: Interesting Things YOU Likely Don't Know
« Reply #37 on: August 13, 2019, 03:09:15 PM »
Quote from: MrNubbz on August 12, 2019, 07:47:34 PM
How come when you launch a loogie it doesn't suspend surrounded by more Nitrogen/Oxygen,asking for a friend
Flippant answer: I dunno. What'd you eat? I don't know what's in YOUR loogies!

Real reason: For the same reason rain actually falls to the ground. Water is much more dense in liquid form than vapor form. As long as it's liquid, it's much heavier (per unit volume) than nitrogen/oxygen gases. Just like liquid nitrogen will "sink" in the air because it's a more dense form than gaseous nitrogen.
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MrNubbz

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Re: Interesting Things YOU Likely Don't Know
« Reply #38 on: August 13, 2019, 04:24:43 PM »
Quote from: CWSooner on August 13, 2019, 03:06:20 PM
It's just a measure of speed through the water, like airspeed indicators just measure speed through the air.  Water currents and wind of course change how movement through the media results in movement relative to the geographic grid.
Still a weird way to measure speed.Say you have a Mercruiser I/O at half throttle the boat speed is still predicated on wind,wave direction & height ,current.On a flat windless day you'll get more speed at the same throttle increments
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MrNubbz

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Re: Interesting Things YOU Likely Don't Know
« Reply #39 on: August 13, 2019, 04:29:59 PM »
Quote from: bwarbiany on August 13, 2019, 03:09:15 PM
Flippant answer: I dunno. What'd you eat? I don't know what's in YOUR loogies!
Would an IPA loogie have longer hang time than say an Oatmeal Stoudt or Doppelbock loogie.Man this off season has been ridiculously brutal
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FearlessF

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Re: Interesting Things YOU Likely Don't Know
« Reply #40 on: August 13, 2019, 04:32:58 PM »
Quote from: MrNubbz on August 13, 2019, 04:24:43 PM
Still a weird way to measure speed.Say you have a Mercruiser I/O at half throttle the boat speed is still predicated on wind,wave direction & height ,current.On a flat windless day you'll get more speed at the same throttle increments
a solid way to measure speed

your mercruiser going upstream on the Missouri river against a 12 mph current isn't the same as going downstream with the same current regardless of throttle position of RPM
speed is speed
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MrNubbz

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Re: Interesting Things YOU Likely Don't Know
« Reply #41 on: August 13, 2019, 04:37:17 PM »
I understand going 35 mph down a road,I guess I'm thinking more along the lines of RPM.And FF you aren't factoring in those flying asian carp you have to duck - those'll slow you down
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