Here is a Chemistry, Physics, and Maths joke:
I tried to tell a joke to a cloud of Argon. There was no reaction.
I’ve always found black holes timeless.
I’m dividing tangents by sines, just give me a sec.
My preferred ending:
The second says “I’ll also have water – and why did you ask for it in such an odd way?”
The first scientist is annoyed because the cunning assassination attempt failed.