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Mnemonics

Last updated: Aug 5, 2020 ·
Posted in wiki#notes

Morse code

[Wikipedia, Vsauce video]

Alphabets

AlphabetMnemonicMorse code
AaPART• -
BBOOT to the head- • • •
CCO-ca CO-la- • - •
DDOCK WORK-er- • •
Eeh?•
Fget a HAIR-cut• • - •
GGOOD GRAV-y- - •
Hhip-pi-ty hop• • • •
Ii-i• •
Jlets JUMP JUMP JUMP• - - -
KKAN-ga-ROO- • -
Lhe LOST his lid• - • •
MMMMM-MMMM- -
NNA-vy- •
OONE OF US- - -
Pa POO-py smell• - - •
QGOD SAVE the QUEEN- - • -
Rro-TA-tion• - •
Ssi-si-si• • •
TTALL-
Uun-der-WHERE?!• • -
VBeet-ho-ven's FIFTH• • • -
Wa WHITE WHALE• - -
XX marks the SPOT- • • -
YWHY did I DIE?- • - -
ZZINC ZOO-keep-er- - • •

Numerals

NumeralMorse code
1• - - - -
2• • - - -
3• • • - -
4• • • • -
5• • • • •
6- • • • •
7- - • • •
8- - - • •
9- - - - •
0- - - - -

Characters

CharacterSyllabic mnemonicMorse code
.a STOP a STOP a STOP• - • - • -
,COM-MA, it's a COM-MA- - • • - -
?it's a QUESTION, is it?• • - - • •
:HA-WA-II stan-dard time- - - • • •
/SHAVE and a HAIR-cut- • • - •
"six-TY-six nine-TY-nine• - • • - •
'and THIS STUFF GOES TO me!• - - - - •
;A-list, B-list, C-list- • - • - •

Major system

[Wikipedia]

NumeralAssociated lettersMnemonic
1t, dt, d have 1 downstrokes
2nn has 2 downstrokes
3mm has 3 downstrokes
4rFour ends with r
5lRoman numeral L equals 50
6j, sh, ch, soft gUppercase G looks like a 6
7k, hard g, hard c7 is angular like the k
8f, v, phCursive f looks like an 8
9p, b9 looks like a backward p
0z, s, soft cZero begins with z

To remember the list in order: Tony Marloshkovips

When creating mnemonics with the major system, the consonant sounds of h, w, and y can be added freely since they don’t appear on the list. For example, 32 can become man, human, or woman.

NATO phonetic alphabet

[Wikipedia]

Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu

Programming

  • CSS margin: TRouBLe (Top Right Bottom Left)

    .class {
  margin: T R B L 
}

  • JavaScript unshift vs shift:

    • unshift is longer. Makes the array longer.
    • shift in shorter. Makes the array shorter.

Misc

  • Confronting a screw:

    Righty-tighty, Lefty-loosy or Right on, Left off

  • Identifying coral snakes:

    Red touches yellow, kills a fellow. Red touches black, friend of Jack.

  • Order of taxa in biology (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, [Variety]):

    Dear King Philip Came Over For Good Soup.

  • Order of planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto):

    My Very Easy Method Just Speeds Up Naming Planets.
    For eight planets: My Very Easy Memory Jingle Seems Useless Now

  • PANIC: Positive Anode Negative Is Cathode.

  • The Great Lakes in order of largest to smallest (Superior, Huron, Michigan, Erie, Ontario):

    Super Heroes Must Eat Oats.

  • Euler's characteristic (X = F + V - E): fav.me (F add V, minus E)

  • 10 organ systems of the human body (Nervous, Integumentary, Circulatory, Endocrine, Respiratory, Digestive, Reproductive, Urinary, Muscular, Skeletal): NICER DRUMS

  • Colors of rainbow (Red, Orange, Yellow, Green, Blue, Indigo, Violet): ROYGBIV

  • Speed of light (299,792,458):

    We guarantee certainty, clearly referring to this light mnemonic. (Counting the number of letters in each word)

  • Increasing frequency or decreasing wavelength of electromagnetic waves (Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-Rays, Gamma Rays):

    Rich Men In Vegas Use eXpensive Gadgets
    Opposite order: Good Xylophones Use Very Interesting Musical Rhythms

  • Number of days in each month (Thirty Days Hath September or Knuckle mnemonic):

    Thirty days has September,
    April, June, and November,
    All the rest have thirty-one,
    Save February at twenty-eight,
    But leap year, coming once in four,
    February then has one day more.

    I use the phrase SNAp June to remember September, November, April and June.

  • Trigonometric ratios (Sine = Opposite / Hypotenuse, Cosine = Adjacent / Hypotenuse, Tangent = Opposite / Adjacent): SOH-CAH-TOA

  • Sign of each trigonometric functions in each quadrant of the plane: All Students Take Calculus or ASTC

    • Quadrant I: All trigonometric functions are positive.
    • Quadrant II: Sine and cosecant functions are positive.
    • Quadrant III: Tangent and cotangent functions are positive.
    • Quadrant IV: Cosine and secant functions are positive.

  • Resistor color codes: Better Be Right Or Your Great Big Vacation Goes Wrong.

    • 0 = Black
    • 1 = Brown
    • 2 = Red
    • 3 = Orange
    • 4 = Yellow
    • 5 = Green
    • 6 = Blue
    • 7 = Violet
    • 8 = Gray
    • 9 = White

  • e (2.718281828459045)

    • Andrew Jackson was the 7th president of the US: 7
    • He was elected in 1828 and served two terms: 1828 1828
    • His favorite type of triangle was the right angled isosceles triangle: 45 90 45