A bat hitting a Baseball is an elastic collision which means there is a transfer of momentum from the bat to the ball. Since momentum is equal to mass multiplied by velocity, a higher mass means more momentum.
However, you also must consider that it is harder to swing a heavier bat and therefore it will travel slower and therefore have less momentum.
Most likely a few things will happen:
1. Your bat speed will decrease.
2. Your swing will become longer and you hands will most likely no longer be inside the baseball.
When your bat speed decreases and your swing lengthens it will become harder to hit faster pitching. The key to being a good hitter is a quick bat and short compact swing to the baseball.

it matters what size you are and the bat
it is the gravity affects the weight
Yes because if there's more weight, the skateboard will go faster. Less weight it will go slower.
the heaviest one
yes because Gravity is pulling it down and the heavier the mass the farther it will travel down the ramp. The heavier it is the more gravity has to pull down
well what is the mass of the meteor, the distance it travels is unimportant
yes it does, however, the velocity at which the object is thrown also is a factor to consider.
the bikes weight the riders weight the riders strength the gear shifts and how well they are used terrain hope that helps! :)
Gravity, the heavier the object the more force gravity has on it, and the faster it can accell before the force of friction (from the wheels, road surface and air) equal the force of gravity till it hits is maximum speed.
Air resistance against the car as it travels and the friction of the wheels against the ground slows it down and so reduces the toy car's potential travelling distance The weight of the car\on the car, the slope of the ramp and the material the car lands on or on the ramp
Weight is the main factor in the flight of the glider. More weight means the glider does not fly great distances. If the weight is less it will travel more distance.
the size does have something to do with the distance a soccer ball can travel.the bigger the ball, the more scoop you can get when you kick the ball. also, the more pumped a soccer ball is, the more force will be needed to kick it farther.
you're body weight builds momentum which accelerates the speed and or distance