A swimmer should avoid places in which many air or gas bubbles rise up to the surface of water. Melyik valasz a helyes?

B, lowering of the bouyant force. Bouyant effect is based on the displacement of a high density medium. But when some of the water is replaced by a gas (e. g. steam or other vulcanic gases) the average density is lower - making the bouyant force less. Decreasing bouyancy creates instability in diving control that is some cases could be lethal for the diver.

Megkérdezhetem, ha már ismétlődik a jelenség, hogy igazából a fizikával vagy az angollal akadnak nehézségeid?