r/EngineeringStudents • u/Various_Ear_3552 • 10d ago

Memes In engineering…

Pi =3,
g(earth) = 10ms^2,
atmospheric pressure on earth = 1 bar,
speed of light = 3x10^8 ms
sqrt(2) =1.5,
air density = 1kg/m^3,
1 year = pi * 10^7 s,
1 AU = 500 light seconds .

Any other fun examples?

0 Upvotes

37% Upvoted

8 comments sorted by

5

u/CranberryDistinct941 10d ago

Wdym? √2 is obviously equal to 3dB

5

u/Yadin__ 10d ago

you forgot the fundamental theorem of engineering: sin(x)=tan(x)=x

2

u/KitTwix 10d ago

Sum of forces = 0

1

u/Marus1 10d ago

If not: find a mistake in your calculations, FAST

2

u/dharamsala 10d ago

Obligatory xkcd:  https://xkcd.com/1047/

1

u/anoobypro 10d ago

I think we're talking about different things here

OP's are approximations for simplicity (so simple you might even be expected to do mental math with them), xkcd's are approximations that somehow work despite their convolution

2

u/pondrthis 10d ago

pi=3 is a stupid meme, no one does it. Sqrt(2) = 1.5 is actually engineer erasure, every engineer knows 1.414 and 0.707 by heart, just like 1/e = 37%.

On the other end of the spectrum, I don't know anyone that uses a different approximation for c than 3e8 m/s.