No.
It depends on where and who to buy it from (from a store or online), what game version (example: handheld, PC game, Scrabble Deluxe, Scrabble Jr, etc.) and if it's a new or used Scrabble game that is being bought.
No, you may not use acronyms in Scrabble. Also, proper nouns (names of places, people, things, etc.) may not be used. For any other questions on certain words being allowed in Scrabble, I suggest you consult the Official Scrabble Player Dictionary available online at Hasbro's website.
energy is used in many ways. -cars- -light- -air(fan etc.) -etc. etc.-
it can be used for mouthguards etc.
a flute is used in orchestra's, bands etc, etc... If you're talking about a wine glass, than it used used to drink sparkling wines.
No. Av is not allowed in Scrabble.
No. NASA is not allowed in Scrabble.
No. Ac is not allowed in Scrabble.
No. Queap is not allowed in Scrabble.
It is used to pave roads etc.
Swords, spears, maces, etc etc.
RESEARCH , ROCKET launching , robotics , etc etc