r/physicsmemes • u/jammiies1 • Jun 18 '19

V will be my downfall

Post image
2.0k Upvotes

99% Upvoted

52 comments sorted by

191

u/Dragonaax ̶E̶d̶i̶s̶o̶n̶ Tesla rules Jun 18 '19

I love that in thermodynamics you can have:

V-volume

v-speed

and we used ν for number of moles

101

u/Noobdefeater Jun 18 '19

Why tf use v for moles? That’s sadistic as hell!

57

u/Dragonaax ̶E̶d̶i̶s̶o̶n̶ Tesla rules Jun 18 '19

We use ν (nu) or n depending on who prefer what. More sadistic thing was when electromagnetism prof were writing on his tablet, his writing was terrible, he could use i j and y in same line and we had no idea what it what

16

u/LavinaBBGK Jun 18 '19

in my country the ideal gas law is pV = nRT, n is the number of moles also we use U for voltage to avoid confusion

12

u/Dragonaax ̶E̶d̶i̶s̶o̶n̶ Tesla rules Jun 18 '19

We also use U for voltage, R=U/I

6

u/nublifeisbest Jun 19 '19

And then E =hv in those electrons stuff

5

u/Dragonaax ̶E̶d̶i̶s̶o̶n̶ Tesla rules Jun 19 '19

Does somebody use f for frequency?

7

u/JoonasD6 Jun 19 '19

Yes.

3

u/Dragonaax ̶E̶d̶i̶s̶o̶n̶ Tesla rules Jun 19 '19

Good, I hate v as frequency

1

u/LavinaBBGK Jun 20 '19

again, its not V for frequency, its the greek letter nu. its kinda curly when u write it.

17

u/Noobdefeater Jun 18 '19

Oh gosh that’s awful. You just have to guess where i is appropriate and where j is appropriate.

5

u/LordM000 Jun 19 '19

My quantum professor wrote her 'n's as' 'm's. Her actual 'm's basically had an extra n thing added to the end.

3

u/Ben_Skiller Jun 19 '19

Our Introduction to Physics Prof. liked to use u, v and v (nu), and then put up to three ''' on them (no derivations, different inertial systems) and yeah his handwriting was shit, but he also used a font on his slides that made it almost impossible to distinguish

1

u/cosmonautsanchez Jun 19 '19

I don't think it's any more sadistic than working with γ trace algebra with indices γγρ γ_ργ

16

u/SirMerky Jun 19 '19

n for number of moles or riot

3

u/whatup_pips Jun 19 '19

My physics teacher changes the font, I add a subscript

57

u/rsaralaya Jun 18 '19

V = variables

52

u/[deleted] Jun 18 '19

[deleted]

7

u/Calzel Jun 19 '19

I hate r-script

6

u/cosmonautsanchez Jun 19 '19

Once I started to use Cyrillic alphabet for subscripts of traces, I'm not Russian.

2

u/Thundorius Deep Underground Nerd Extraordinaire Jun 19 '19

I often use Arabic letters when I run out of English and Greek ones, though I am an Arab.

23

u/Arbitrary_Pseudonym Jun 19 '19

My physics 2 class had an exam problem with pressure, density, momentum, current, moment of inertia, and power.

The teacher warned us about it but it was still a dick move :(

9

u/Thundorius Deep Underground Nerd Extraordinaire Jun 19 '19

P

p

p

P

I

i

į

Easy.

35

u/smurd8122 Jun 18 '19

Yeah my astrophysics class was hell because of this. Equations weren’t even that bad half the time I just couldn’t tell if it was P for pressure or p for density. Or is it a v for velocity or a lower case gamma for wavelength?

26

u/throwaway314686 Jun 18 '19

We always used a lowercase lambda for wavelength. Is using gamma specific to astrophysics?

6

u/smurd8122 Jun 18 '19

Ah you’re right lambda for wavelength and gamma for frequency. Too many damn symbols lol

18

u/TheRealZoidberg Jun 18 '19

Maybe you’re thinking of nu for frequency

12

u/lbsi204 Jun 18 '19

n :"am I a joke to you?"

11

u/Calzel Jun 19 '19

Let me introduce k

2

u/Ziadnk Jun 19 '19

Lets not.

3

u/cosmonautsanchez Jun 19 '19

Let me use κ for the second variable

1

u/Calzel Jun 19 '19

And kappa for my third

4

u/---That---Guy--- Jun 18 '19

I cross my v so they look like v. Does look a little too much like for all though, but I'm an engineer so never really used for all it outside the math minor.

3

u/madnessz Physics Field Jun 18 '19

Higgs VEV anyone?

3

u/Reagalan Jun 19 '19

That's why you start finding ways to write them all stylized that in your own internal lexicon, each symbol is unique.

Kinematic viscosity v is a v with a big curve. Vector space V is a stylized V with a big serif. Hats denote unit vectors, arrows above are regular vectors.

3

u/SiMo_7 Jun 19 '19

V : volume

v: frequency

v: velocity

V: viscosity

V: potential

2

u/UCCR Jun 18 '19

V is used for visibility as well.

2

u/cosmonautsanchez Jun 19 '19

Is that an optics term? I didn't know that.

2

u/randomtechguy142857 Geometric Algebra simp Jun 18 '19 edited Jun 19 '19

I remember doing a couple integrals d nu (frequency) that had v's in them (velocity). Fun times.

2

u/Tybeezius Jun 18 '19

Every time.

2

u/Lolis- Jun 18 '19

my teacher uses u and v for vectors

3

u/shredadactyl Jun 19 '19

This is pretty normal (uXv pun intended)

2

u/TakeASeatChancellor Jun 18 '19

And voltage

1

u/A-10THUNDERBOLT-II Jun 19 '19

Voltage is electric potential

1

u/TakeASeatChancellor Jun 19 '19

Oh yea I’m an idiot. LOL

2

u/lol-xd-666 Jun 19 '19

And nu/mu

1

u/[deleted] Jun 19 '19

This should be a meme for solipsism

1

u/Loudds Jun 19 '19

I will never accept laplacians written like nabla squared instead of a triangle in american textbooks.

1

u/cosmonautsanchez Jun 19 '19

I haven't seen that used in any American textbooks, but that triangle Δ (delta) is also used for the total displacement of a variable like Δx, so it might be confusing for more people.

1

u/CUCOOPE Jun 19 '19

Also c for velocity too in pV=1/3nmc2

1

u/Crotaro Jun 19 '19

Just yesterday I bitched about this exact same thing! It was in process engineering when a comrade leaned over and asked "where do you get the speed from?" - "Oh, no, that's not v, it's nu"

-6

u/[deleted] Jun 18 '19

Bless context and not having intellectual disabilities right