The only way to keep a tame duck from flying is to clip the wingtips. It's best (and safest) if you let a trained vet do this; However, there are online instructions for doing it yourself.
to crash it
They are filled with air, which is less dense than water, therefore keeping you afloat.
The buoyant force keeps a submarine afloat.
buoyant force.
The bouyancy of the vessel keeps it afloat. As long as the force of bouyancy is larger then the mass of the ship it will stay afloat.
The superstructure is the part of a ship above the main deck, carried by the ship but not responsible for keeping it afloat.
The basic principle is keeping it moving forward fast enough for the wings to get 'lift'. That is of course a simplification as there is much more to it
Equal to the weight of the displaced fluid
idiots its duck hahaha
By keeping the water out. Don't exceed the boat's weight capacity and don't allow any holes in the boat.
Peking Duck