
## Soma cube solution

![Soma cube solution](/img/notes/soma-cube-solution.svg)


Misc puzzles

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Soma cube solution

## Morse code

[[Wikipedia](https://en.wikipedia.org/wiki/Morse_code_mnemonics#English), [Vsauce video](https://www.youtube.com/watch?v=HY_OIwideLg)]

### Alphabets

| Alphabet | Mnemonic | Morse code |
| -------- | ------------------- | ---------- |
| A | aPART | • - |
| B | BOOT to the head | - • • • |
| C | CO-ca CO-la | - • - • |
| D | DOCK WORK-er | - • • |
| E | eh? | • |
| F | get a HAIR-cut | • • - • |
| G | GOOD GRAV-y | - - • |
| H | hip-pi-ty hop | • • • • |
| I | i-i | • • |
| J | lets JUMP JUMP JUMP | • - - - |
| K | KAN-ga-ROO | - • - |
| L | he LOST his lid | • - • • |
| M | MMMM-MMMM | - - |
| N | NA-vy | - • |
| O | ONE OF US | - - - |
| P | a POO-py smell | • - - • |
| Q | GOD SAVE the QUEEN | - - • - |
| R | ro-TA-tion | • - • |
| S | si-si-si | • • • |
| T | TALL | - |
| U | un-der-WHERE?! | • • - |
| V | Beet-ho-ven's FIFTH | • • • - |
| W | a WHITE WHALE | • - - |
| X | X marks the SPOT | - • • - |
| Y | WHY did I DIE? | - • - - |
| Z | ZINC ZOO-keep-er | - - • • |

### Numerals

| Numeral | Morse code |
| ------- | ---------- |
| 1 | • - - - - |
| 2 | • • - - - |
| 3 | • • • - - |
| 4 | • • • • - |
| 5 | • • • • • |
| 6 | - • • • • |
| 7 | - - • • • |
| 8 | - - - • • |
| 9 | - - - - • |
| 0 | - - - - - |

### Characters

| Character | Syllabic mnemonic | Morse 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](https://en.wikipedia.org/wiki/Mnemonic_major_system)]

| Numeral | Associated letters | Mnemonic |
|---------|--------------------|----------------------------|
| 1 | t, d | t, d have 1 downstrokes |
| 2 | n | n has 2 downstrokes |
| 3 | m | m has 3 downstrokes |
| 4 | r | Four ends with r |
| 5 | l | Roman numeral L equals 50 |
| 6 | j, sh, ch, soft g | Uppercase G looks like a 6 |
| 7 | k, hard g, hard c | 7 is angular like the k |
| 8 | f, v, ph | Cursive f looks like an 8 |
| 9 | p, b | 9 looks like a backward p |
| 0 | z, s, soft c | Zero 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](https://en.wikipedia.org/wiki/NATO_phonetic_alphabet)]

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)

 ```css
 .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.
- **LEO the lion says GER**: **L**oss of **E**lectrons, **O**xidation; **G**ain of **E**lectrons, **R**eduction
- **AN OIL RIG CAT**

 At the **AN**ode, **O**xidation **I**nvolves electron **L**oss. 
 **R**eduction **I**nvolves electron **G**ain at the **CAT**hode.

- 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** (**VIBGYOR** in reverse)
- 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**

- Layers of atmosphere (Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere): **The Strong Man's Triceps Exploded**
- OSI Network Layer model (Physical, Datalink, Network, Transport, Session, Presentation, Application) **Please Do Not Throw Sausage Pizza Away**
- Differentiating stalactites from stalagmites: **The 'mites go up and the 'tites come down**
- Order of Operations (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction): **PEMDAS**
- Determining which functions are to be chosen as u and DV in integration by parts (Logarithmic, Inverse trigonometric, Algebraic, Trigonometric, Exponential): **LIATE**
- The first 11 (and most important) Ionian philosophers (Thales, Heraclitus, Empedocles, Leucippus, Anaximander, Democritus, Zeno, Anaximenes, Protagoras, Parmenides, Anaxagoras): **THE LAD ZAPPA**

- Number of days in each month ([Thirty Days Hath September](https://en.wikipedia.org/wiki/Thirty_Days_Hath_September) or [Knuckle mnemonic](https://en.wikipedia.org/wiki/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

Mnemonics


Experimenting with KaTeX.

$$
\int\frac{1}{a^2+x^2}\,dx = \frac{1}{a}\arctan{\frac{x}{a}} + c
$$
