Sprawdzi mi ktoś czy to jest poprawnie napisane po angielsku?
The problem
Will a needle float in water if you drop it?
Will a needle float if you put it gently on the water?
Observation
If you quickly drop the needle in water, it sinks to the bottom
If you put the needle on tissue paper or it gently put on the water, it floats on the surface of the water.
Explamation
How is this possible? With a little thing we scientists call surface tension. Basically it means that there is a sort of skin on the surface of water where the water molecules hold on tight together. If the conditions are right, they can hold tight enough to support your paper clip. The paperclip is not truly floating, it is being held up by the surface tension. Many insects, such as water striders, use this "skin" to walk across the surface of a stream.
tak poprawnie ;)))))))))))
Hmmmm , przeczytałam uważnie i myślę że poprawnie ;)