Question

my homework is learn buofany for oral test. please tell me what is this?

Answer 1

I think you mean bouyancy
and if am right then...

When a body is immersed in a fluid( liquid or gas) it exerts an upward force on the body. This upward force is called upthrust or bouyant force and the phenomenon is termed as bouuancy.

Hope this may help you for oral test....