Useful rhymes, mnemonics etc.
 

My wife was having silver nitrate put on her toe recently and I was reminded of one of the few chemical formulas I know. Taught to the class about 1974 by our science teacher. Something like:

Little Jimmy died last week
Alas, he is no more.
For what he thought was H2O
Was H2SO4

I must stop drinking from batteries.

Now I just need a mnemonic to help me spell mnemonic correctly first time.

1)PEDMAS/BEDMAS < - from memory
2)"Richard of York gave battle in vain" = roygbiv = "roy great britain the fourth" <- from wikipedia, but I knew roygbiv already.
3)ohel(hebrew, means tent) = " [B]oh hell[/B],there's a raccoon in my tent" <- from wikipedia
4)"There's a fork in Ma’s leg" = mazleg ( hebrew, for fork)<- from wikipedia
5) "to be a star" = estar(spanish, to be)<- from wikipedia

Llave, aqui! (spanish, translated "Key, here." Best done when holding a key.)

One of my favorite quotes from a math teacher of mine was, "Close only counts in hand grenades, horseshoes, and slow dancing."

[QUOTE=rogue;257803]One of my favorite quotes from a math teacher of mine was, "Close only counts in hand grenades, horseshoes, and slow dancing."[/QUOTE]

I never heard the slow dancing part. And generally it was horseshoes then hand grenades.

Odissea | it " lo disse (ea) lei" dialect Venexian
 

[QUOTE=Flatlander;257793]My wife was having silver nitrate put on her toe recently and I was reminded of one of the few chemical formulas I know. Taught to the class about 1974 by our science teacher. Something like:

Little Jimmy died last week
Alas, he is no more.
For what he thought was H2O
Was H2SO4

I must stop drinking from batteries.

Now I just need a mnemonic to help me spell mnemonic correctly first time.[/QUOTE]

"[URL="http://www.youtube.com/watch?v=yAsYjbDBeQg&feature=player_detailpage"]Calypso[/URL]" call_upsao travel ([URL="http://alberodimaggio.blogspot.com/2009/07/calypso-filosofico.html"]R.Mit+ch-um[/URL])



[COLOR="LemonChiffon"]( worth something ? )
[/COLOR]

Bad Boys Rape Our Young Girls But Violet Gives Willingly -- the salacious version of the mnemonic for the resistor color code -- Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Gray=8, White=9.

[url]http://www.mersenneforum.org/showthread.php?t=14245[/url]

[QUOTE=Uncwilly;257823][URL]http://www.mersenneforum.org/showthread.php?t=14245[/URL][/QUOTE]Indeed.

This ( [url]http://www.bbc.co.uk/news/uk-england-sussex-12584669[/url] ) appeared since the last burst of activity on that thread. Perhaps this post ought to be in the WTF thread...

Paul

[QUOTE=Uncwilly;257823][url]http://www.mersenneforum.org/showthread.php?t=14245[/url][/QUOTE]

Oops. Forgot about that thread.

Surplus Post About Mnemonics

[QUOTE=Uncwilly;257823][url]http://www.mersenneforum.org/showthread.php?t=14245[/url][/QUOTE]

Even I forgot about this one. HAHA

[QUOTE=Flatlander;257793]Now I just need a mnemonic to help me spell mnemonic correctly first time.[/QUOTE]

[B]M[/B]ersenne [B]N[/B]umbers [B]E[/B]nsure [B]M[/B]ost [B]O[/B]ften [B]N[/B]aturally [B]I[/B]nteresting [B]C[/B]onversations

[B]M[/B]ersenne [B]N[/B]umber [B]E[/B]nthusiasts [B]M[/B]ust [B]O[/B]ften [B]N[/B]avigate [B]I[/B]nextricable [B]C[/B]omputations

[B]M[/B]ersenne [B]N[/B]umbers [B]E[/B]ntail [B]M[/B]any [B]O[/B]stensible [B]N[/B]efarious [B]I[/B]nternet [B]C[/B]omputations

[QUOTE=ATH;257842][B]M[/B]ersenne [B]N[/B]umbers [B]E[/B]nsure [B]M[/B]ost [B]O[/B]ften [B]N[/B]aturally [B]I[/B]nteresting [B]C[/B]onversations

[B]M[/B]ersenne [B]N[/B]umber [B]E[/B]nthusiasts [B]M[/B]ust [B]O[/B]ften [B]N[/B]avigate [B]I[/B]nextricable [B]C[/B]omputations

[B]M[/B]ersenne [B]N[/B]umbers [B]E[/B]ntail [B]M[/B]any [B]O[/B]stensible [B]N[/B]efarious [B]I[/B]nternet [B]C[/B]omputations[/QUOTE]

"Mersenne numbers ensure most naturally
number enthusiasts must navigate
entail many nefarious"

Many enthusiasts random sieve [B]entail[/B] numbers naturally [COLOR="red"][I]ensure[/I][/COLOR]

Many enthusiasts real sieve [COLOR="Red"][I]ensure[/I][/COLOR] numbers naturally [B]entail[/B]



( ex - changes ) exchanges

[QUOTE=Uncwilly;257804]I never heard the slow dancing part. And generally it was horseshoes then hand grenades.[/QUOTE]

and nuclear warheads

Not a rhyme or mnemonic, but related. To remember log[SUB]10[/SUB](2), memorize

F[SUB]12[/SUB] has 1234 digits.

The leading digits are 1044... so 2^4096 is pretty close to 10^1233, and 1233/4096 gives you the logarithm with relative error ~1.5e-5.

Comments about previous posts, followed by one I learned from my amateur-astronomer father growing up -

- Spanish for key is "Clave" (not Llave) - Think 'clavicle", literally the 'key bone' due to its shape similar to an old-fashioned bent-wire key. (In English that connection has been lost, but e.g. in German it`s called key-ishly "Schlüsselbein")

- The resistor-color one could be made a bit more inoffensive by replacing "rape" with "ravish".

- The bit about "hand grenades" used to confuse me ... I always the thought the point of hand grenades was to be able to do major damage (especially to concealed targets not reachable by gunfire) *without* having to get terribly close. Thankfully some explained that the reference was to the hand grenade only having to go off near someone to have its desired effect.

[QUOTE=akruppa;257875]Not a rhyme or mnemonic, but related. To remember log[SUB]10[/SUB](2), memorize

F[SUB]12[/SUB] has 1234 digits.

The leading digits are 1044... so 2^4096 is pretty close to 10^1233, and 1233/4096 gives you the logarithm with relative error ~1.5e-5.[/QUOTE]

Cute, but simply remembering the 5-digit palindrome "30103" (especially easy for U.S. residents, since it has the same format as U.S. postal codes) gives accuracy 1000 times better.

--------------

The astronomical mnemonic I learned from my Dad is the one commonly used to encode the stellar classifications of the famous [url=http://en.wikipedia.org/wiki/Hertzsprung%E2%80%93Russell_diagram]Hertzsprung–Russell diagram[/url] (which is to stars much like the periodic table is to chemistry):

"Oh Be A Fine Girl, Kiss Me"

[There were also several off-main-branch stellar types which were remembered via the extended version

"Oh Be A Fine Girl, Kiss Me Right Now Sweetheart".

[QUOTE=ewmayer;258311]Cute, but simply remembering the 5-digit palindrome "30103" (especially easy for U.S. residents, since it has the same format as U.S. postal codes) gives accuracy 1000 times better.[/QUOTE]Something I first memorized decades ago, despite not having the benefit (?)of being a U.S. resident.

Paul

[quote=xilman;258324] ... the benefit (!)of being a U.S. resident.
[/quote]

Couldn't resist the minor alteration.

But Hail Britania, Britania rules the waves !

[QUOTE=davar55;258326]Couldn't resist the minor alteration.

But Hail Britania, Britania rules the waves ![/QUOTE]Couldn't resist the minor alteration.

Rule Britannia, Britannia rules the waves.

[quote]Couldn't resist the minor alteration.

Rule Brittania. Brittania rules the waves.[/quote]

Oh hail, a lex error and a d*mn double typo.
Are you absolutely sure two t's? I guess
someone proud of being British would know
how to spell Britain. Or maybe my error was
just an Americanization? The are no double
letters in the United States of America.
Well, maybe in Massachusetts and Connecticut.

Rule Britannia, the Sun Never Sweats, and all that.

Just remembered a German one I learnt as a wee lad forced into violin lessons: The strings on a violin have basic tones G,D,A,E, the German mnemonic used to make that easy to remember is "Geh, Du Alter Esel". (Go, you old donkey).

------------


[i]
("Go, you old ass" sounds a little too much like a solicitation for geriatric naughtiness ... not that there`s anything wrong with that, it could be considered "ribaldry with a new wrinkle")[/i]

[QUOTE=ewmayer;258311]
"Oh Be A Fine Girl, Kiss Me"

[There were also several off-main-branch stellar types which were remembered via the extended version

"Oh Be A Fine Girl, Kiss Me Right Now Sweetheart".[/QUOTE]
Previously dealt with.
[QUOTE=Uncwilly;257823][url]http://www.mersenneforum.org/showthread.php?t=14245[/url][/QUOTE]

[QUOTE=ewmayer;258332]Rule Britannia, the Sun Never Sweats, and all that.

Just remembered a German one I learnt as a wee lad forced into violin lessons: The strings on a violin have basic tones G,D,A,E, the German mnemonic used to make that easy to remember is "Geh, Du Alter Esel". (Go, you old donkey).[I]..[/I][/QUOTE]
And from my early "musical" days:

treble cleff line notes (bottom to top): Every Good Boy Does Fine

Staying with music theory:

Father Christmas Goes Down An Escalator Backwards

for the sharps in their correct order.

"Father Christmas" was the name by which we knew Santa Claus when we were youngsters growing up in Britain. The mnemonic was apparently my violin teacher's own invention.

[QUOTE=EdH;258363]And from my early "musical" days:

treble cleff line notes (bottom to top): Every Good Boy Does Fine[/QUOTE]

I learnt: Every Good Boy Deserves a Favour

David

Father Charles Goes Down And Ends Battle

Battle Ends And Down Goes Charles's Father

which does the sharps and flats in a nicely palindromic way

[QUOTE=davieddy;258404]I learnt: Every Good Boy Deserves a Favour

David[/QUOTE]And I: Every Good Boy Deserves Food.

Don't know if the eight planets mneonics have been mentioned,
but My Very Educated Mother Just Served Us Nine Plums is
now out of date. Cavalierly ignoring Pluto might result in a
simple mod: (she) just served us nothing (perhaps as a show
of support for nine planets).

[QUOTE=davar55;258445]Don't know if the eight planets mneonics have been mentioned,
but My Very Educated Mother Just Served Us Nine Plums is
now out of date. Cavalierly ignoring Pluto might result in a
simple mod: (she) just served us nothing (perhaps as a show
of support for nine planets).[/QUOTE]

By another interpretation there could be 11 planets.

[url]http://www.universetoday.com/15568/how-many-planets-are-in-the-solar-system/[/url]

[QUOTE]The IAU decided that Pluto and Eris should be reclassified as dwarf planets. The asteroid Ceres meets those requirements, so it’s a dwarf planet too.

So, how many planets in the Solar System? Until a new, large object is discovered out beyond Pluto, there are only 8 planets, and 3 dwarf planets.[/QUOTE]

Well tempered klavier
 

[QUOTE=fivemack;258406]Father Charles Goes Down And Ends Battle

Battle Ends And Down Goes Charles's Father

which does the sharps and flats in a nicely palindromic way[/QUOTE]
[url=http://www.youtube.com/watch?v=V0D0lA3rOUo]C sharp major (Vol I)[/url]

Now how can anyone say this would sound different in D flat major?

David

[QUOTE=davieddy;258454][url=http://www.youtube.com/watch?v=V0D0lA3rOUo]C sharp major (Vol I)[/url]

Now how can anyone say this would sound different in D flat major?

David[/QUOTE]

well if my memory serves me correct they would be multiplying the average frequency by 2^(1/12) = 1.5 if I remember my laws of strings that I read after the physics 11 high school exam I think.

[QUOTE=davieddy;258454][url=http://www.youtube.com/watch?v=V0D0lA3rOUo]C sharp major (Vol I)[/url]

Now how can anyone say this would sound different in D flat major?

David[/QUOTE]

Sound the same but notated differently:

[CODE]C#, D#, E#, F#, G#, A#, B#, C#
Db, Eb, F, Gb, Ab, Bb, C, Db[/CODE]

[QUOTE=petrw1;258459]Sound the same but notated differently:

[CODE]C#, D#, E#, F#, G#, A#, B#, C#
Db, Eb, F, Gb, Ab, Bb, C, Db[/CODE][/QUOTE]

[root]major scale has 2,2,1,2,2,2,1 for the spacing.
[root]major chord has spacing 4,3

I tried teaching my uncle some basics about chords and guitar when he was living here with a broken wrist ( I know kinda pointless).

[QUOTE=science_man_88;258456]well if my memory serves me correct they would be multiplying the average frequency by 2^(1/12) = 1.5 if I remember my laws of strings that I read after the physics 11 high school exam I think.[/QUOTE]

One accident that makes conventional western music so compelling
is that 2^(7/12) = 1.498.

Perhaps that was what you were "thinking" of.

Pythagoras

[QUOTE=davieddy;258474]One accident that makes conventional western music so compelling
is that 2^(7/12) = 1.498.

Perhaps that was what you were "thinking" of.

Pythagoras[/QUOTE]

yeah it's what I was thinking of up a perfect fifth = ~1.5 thanks for the reminder. each note increases it by 5% though at last check.

[QUOTE=petrw1;258459]Sound the same but notated differently:

[CODE]C#, D#, E#, F#, G#, A#, B#, C#
Db, Eb, F, Gb, Ab, Bb, C, Db[/CODE][/QUOTE]

E# = F last time I checked the music I know.

[QUOTE=science_man_88;258468][root]major scale has 2,2,1,2,2,2,1 for the spacing.
[root]major chord has spacing 4,3

[/QUOTE]

You are talking of 2^(1/12) semitones here.

The most "harmonious" major chord has frequencies proportional to
1,2,3,4,5,6,8,10....
Now if you tune correctly, the inclusion of 7 and 9
sounds glorious.
If 8 is "C" then 9 is roughly "D" (8.98)
OTOH 7 is halfway between A and B flat.
David