If you mean by hitting the ball twice, then yes.
yes.
In singles...the ball hit inside of the side double lines. In doubles...the ball hit outside of the side double lines.
The opposition get a point for a double fault
A double touch in tennis is referred to as a "double hit." This occurs when a player strikes the ball twice in succession with their racket, which is usually considered a fault. According to the rules, if the ball is hit twice in one stroke, it counts as a single hit, but if the player intentionally or unintentionally makes two distinct contacts, it results in a loss of the point.
It is not illegal to hit a boy but it is illegal to hit a girl.
A tennis ball
A tennis ball?!
A tennis raquet is bigger, and stronger too as it has to hit tennis balls not shuttlecock.
Yes, the weight. The lighter the tennis racket, the lighter you hit the ball. The heavier racket can hit harder shots.
It depends on how hard you want to hit the ball
No, as long as your feet don't cross the baseline, your fine. *Note- do not catch the ball with your racket if you decide not to hit your toss. If it touches the racket, it counts as a serve.
it is illegal to hit a cow in India because the cow is god