No, a flush cannot beat a full house.
Yes it does. Hand Rankings: Royal Flush Straight Flush 4 of a kind Full House Flush Straight 3 of a kind Two Pair One Pair High Card
No
Yes
Yes
Yes.
Full House.
3 of a kind Aces can not beat a full house. In this particular case it is most likely that there was a pair and an ace already on the board, making the 3 aces and the pair on the board a higher full house then the other full house.
A full house is a full house and a pair is a pair, you can only use five cards to make a hand. You cannot have a full house and a pair.
It doesn't, you obviously misread the bored. It is likely your opponent had full house jacks full of 5s.
A full house is when you have a pair and a three-of-a-kind in the same hand. (e.g. K,K,3,3,3)
Four of a Kind Straight Flush Royal Flush