Yes.
According to MLB Rule 6.06(d), a batter is out for illegal action when:
"He uses or attempts to use a bat that, in the umpire's judgment, has been altered or tampered with in such a way to improve the distance factor or cause an unusual reaction on the Baseball. This includes, bats that are filled, flat-surfaced, nailed, hollowed, grooved or covered with a substance such as paraffin, wax, etc.
No advancement on the bases will be allowed and any out or outs made during a play shall stand.
In addition to being called out, the player shall be ejected from the game and may be subject to additional penalties as determined by his League President.
Rule 6.06(d) Comment: A batter shall be deemed to have used or attempted to use an illegal bat if he brings such a bat into the batter's box."
Yes the batter can switch as often as he would like. It just has to be after the strike.
Yes, batters can be ejected while they are batting, usually by arguing about the strike the zone with the umpire. This usually only happens after the batter has struck out, rather then in the middle of the count, but if the batter argues too much, the umpire can toss him at any time.
That is solely up to the preference of a batter. I have noticed most batters now days use two but occasionally a batter will wear only one normally on the hand that is lowest on the bat.
That batter would be called out. If the ball goes directly from his bat to hitting the batter when they are not in the batters box, the batter is out. If a defensive player deflects the ball before it touches the batter then play continues as normal.
The batter swinging the bat.
Probably so the bat boy can retrieve it quickly to make way for the next batter.
If the wrong batter completes the at bat, then the skipped batter is recorded as an out. If it is noticed prior to the completion of the at bat the skipped batter assumes the count of the at bat and completes with no additional penalties.
If the batter is still in the batters box, it is a foul ball, otherwise, the batter will be ruled out, and it is a dead ball with runners returning to their bases This is wrong, if the ball hits the bat a second time in fair territory the batter is out, standing in the batters box means nothing in this rule. see MLB rule 6.05 h
In the 2008-2010 MLB seasons, there were 497916 total at bats and 4811 batters hit by the pitch for an average of 0.966 batters hit per 100 at bats.
A batter is credited with an at bat for every plate appearance except: 1) base on balls 2) hit by pitch 3) sacrifice fly 4) sacrifice bunt 5) catcher's interference If an inning ends while a batter is in the middle of an at bat (eg., a base runner is thrown out stealing for the 3rd out) no at bat is credited and the batter is the first batter to bat in the next inning. If the batter is replaced before the at bat is completed, no at bat is credited unless the batter was replaced with two strikes and the replacement batter strikes out. The strikeout is credited to the batter who was replaced.
The batter swinging the bat.
No. The batter can step out between pitches and if he is not in the batters box the pitcher can not pitch. However he may not step out once the pitcher is in motion and if any part of him is out of the box when the ball is hit he will be called out.