Which gun?
The gun weighs MUCH more than the bullet.
The bullet out of the gun will be travelling a lot faster, and with a lot more force than the bullet thrown by hand.
A bullet fired from a gun
A grain is a weight. Smaller than an ounce or a gram- its a tiny amount. When talking about guns, grains refers to how much gunpowder is in each bullet. A bullet with more grains of gunpowder has more bang to it than a bullet with less grains of gun powder.
No. It will still fly straight.
Newton said "For every action, there is an equal and opposite reaction." The action is pushing the bullet in one direction. Reaction is the gun being pushed in the other. The energy is speed times mass. The gun masses much more than the bullet, and so will move proportionately slower than the bullet. Which is a very good thing- or the recoil of the gun would kill the shooter.
It takes more than one shot, but if you have a Ma Deuce, hold down the triggers and sweep the gun from side to side, you can cut people in half with it.
Newton said "For every action, there is an equal and opposite reaction." The action is pushing the bullet in one direction. Reaction is the gun being pushed in the other. The energy is speed times mass. The gun masses much more than the bullet, and so will move proportionately slower than the bullet. Which is a very good thing- or the recoil of the gun would kill the shooter.
If the gun is stationary before the shot, then the momentum of the gun and the momentum of the bullet are equal and opposite after the shot.
There are more people killed each year from a 22lr than any other gun!! There are more people killed each year from a 22lr than any other gun!!
Because the gun is being held.
It depends on the bullet. It can be as little as less than 1 grain, or as much as several grains or more, especially for larger calibers.