I can also add just a comment - like a facebook feed

I don't need to post something to a website

Yet - I wish that they would offer them at an even lower price. Seriously! They don't have to pay for distribution.

hi I like this a lot.

The viscosity of the medium also affects the motion of sound waves.

Seriously? I guess that makes sense. Thus, if my thinking is right then sound would move slower in oil than in water.