The following two are, I believe, by famed textbook writer A. P. French
There was a young fellow named Cole
Who ventured too near a black hole
His dv by dt
Was quite wondrous to see
Now all that’s left is his soul!
Ms. Farad was pretty and sensual
And charged to a reckless potential
But a rascal named Ohm
Conducted her home.
Her decline was, alas, exponential!
I came across this one recently, and I like its subtle cleverness.
Relatively Good Advice
by Edward H. Green
Dear S’: I note with distress
The length of your yardstick is less
And please wind your clock
To make it tick-tock
More briskly. Your faithful friend, S.
e=mc2andallthat 
Genius!! 😂