No. The vaults are simply a big plot device in the Fallout series. The vaults are used to show the McCarthyism and fear of nuclear war that was occurring in America before the events of the game, and as a starting point in Fallout, Fallout 2, and Fallout 3 to show an unfamiliarity and danger of the Wasteland.
But there will be a vault 101 in reality very soon
no
You can not go back in and out of Vault 101. After you first leave the Vault the only time you can go back in is for the quest "Trouble On The Homefront." but once you beat that side quest you are not allowed back in Vault 101 ever.
You can only receive this signal while you are inside Vault 101.
Vault 101 is an Vault-Tec Vault designed withinitial flaws to begin with. The flaws of Vault 101 is the fact that its main doors were never designed to open. In essence, the programing of the vault door never had any reverse opening protocol, which I can assume was hacked by your father on fallout 3. It is one out of 122 vaults that Vault-Tec built with money from government firms.
There are 7 vaults as follows: Vault 87 Vault 92 Vault 101 Vault 106 Vault 108 and Vault 112
Sort of. If you buy Broken Steel, you can get a perk called "Puppies!". If Dogmeat dies, one of his puppies will be at the entrance of Vault 101 waiting for you.
You need to do the "Trouble on the Homefront" quest, anytime 'after' you complete Project purity, you need to get yourself within Radio reception distance of Vault 101, Megaton for instance, and you will hear the Vault 101 distress signal on you Radio, listen to it and you will then know what to do.
no when you enter vault 101 the second time during the trouble on the homefront quest which will begin on the level 10 or so it will let you re-enter the vault the second time but after that it is locked forever
Just North from Vault 101.
Invest in the Puppies Perk if he died. If you just lost him go to Vault 101. He will be right outside Vault 101 if he died too and you get the Puppies Perk.
No, you cannot blow Vault 101's door open. You should be able to with the Fat Man, MIRV, or Missile Launcher, but you can't.
If you are talking about the "Trouble on the Homefront" quest its after you complete Project purity. Travel to a relative distance from 101, Megaton for instance, and you will hear the Vault 101 distress signal on you Radio, listen to it and you will then know what to do. Good luck.