Scientists out there, what are the best physical constants or material properties to have memorized for back-of-the-envelope calculations? [more inside]
posted on Jul 17, 2007 - 25 answers

I could use your help hive mind. I'm currently taking an accounting course in college, and I'm having difficulties with financial statements and what gets reported where. I'm looking a mnemonic system that can embed this into my brain, as well as tricks and formulas which can help simplify this for me. [more inside]
posted on Jan 18, 2007 - 6 answers