- -equals mass times
9.8 meters PER second PER second.
The Big Bang Theory Season 3, Episode 10
Accelerating at an initial rate
of 32 feet PER second.
The Big Bang Theory Season 1, Episode 2
Well, no, not PER se, but...
The Big Bang Theory Season 4, Episode 1
Really more to organize,
you're not actually dirty, PER se.
The Big Bang Theory Season 1, Episode 2
has to be four revolutions PER second.
The Big Bang Theory Season 10, Episode 20