Best adult check ever

While writing my Turkish-English dictionary, I realised that I didn't know the Turkish for "cock", as in cocking a gun, so I looked it up in the Rosetta edition of Websters, and got the following page:

I'm sorry, the word you requested may be inappropriate for children.
We require a password to view the page.

The answer to any of these questions is a valid password for this page:
1. Cher's former partner's last name (4 letters)
2. The cube root of twenty seven (5 letters)
3. The "incident" before the Vietnam War (6 letters)
4. The theory that physiology and physics are drivers of economics (15 letters)
5. A good mustard (5 letters)