The hands are considered part of the bat.

The hands are part of a person's body. If a pitch hits the batter's hands the ball is dead; if he swung at the pitch, a strike is called (NOT a foul). If he was avoiding the pitch, he is awarded first base.

Rules: 2.00 PERSON,
TOUCH, STRIKE (e) and 6.05(f) Official Baseball Rules

The batter-runner must turn to his right after over-running first base.

The batter-runner may turn left or right, provided that if he turns left he does not make an attempt to advance. An attempt is a judgment made by the umpire. The requirement is that the runner must immediately return to first after overrunning or over-sliding it.

Rule: 7.08(c and j)
Official Baseball Rules

If the batter breaks his wrists when swinging, its a strike.

A strike is a judgment by the umpire as to whether the batter attempted to strike the ball. Breaking the wrists, or the barrel of the bat crossing the plate are simply guides to making the judgment of an attempt, these are not rules.

Rule: 2.00 STRIKE
Official Baseball Rules

If a batted ball hits the plate first its a foul ball.

The plate is in fair territory. There is nothing special about it. If a batted ball hits it, it is treated like any other batted ball.

The batter cannot be called out for interference if he is in the batters box.

The batter's box is not a safety zone. A batter could be called out for interference if the umpire judges that interference could or should have been avoided.

Rules: 2.00
INTERFERENCE, 6.06(c) Official Baseball Rules

The ball is dead on a foul-tip.

There is nothing "FOUL" about a foul-tip. It is a strike and the ball is alive. A foul-tip is the same as a swing and a miss. To be a foul-tip, by rule, the ball must go sharp and direct from the bat to the catcher's hand or glove AND BE CAUGHT.

Confusion arises on this because people commonly call any ball that is tipped or nicked a foul-tip. It is not a foul-tip, by rule, unless the nicked or tipped ball is caught. If it is not caught, it is simply a foul-ball. A foul-ball is a dead ball. A foul-tip (a legally caught nick) is a live ball strike, just like a swing and a miss.

Read the rule in the Official Baseball Rules