
Look at Planck's CONSTANT.
People say that's arbitrary.
The Big Bang Theory Season 2, Episode 18

- That's an interesting tie clip.
- Oh, thanks. It's Avogadro's CONSTANT.
The Big Bang Theory Season 9, Episode 10

I'm sorry. Amy is
the one CONSTANT I can count on,
The Big Bang Theory Season 12, Episode 23

Yeah, and maintain a CONSTANT condition
of properties like temperature or pH.
The Big Bang Theory Season 6, Episode 2

And an irrational CONSTANT.
The Big Bang Theory Season 5, Episode 16