b) To be fair...I have a bit of a wild card up my sleeve with this whole southern hemisphere query...I shot off an email to my sister-in-law who lives in Bondi, NSW, Australia and asked her to do me a solid and see which way her sink drained. I wanted to make sure that she was using standing sink water and not toilet water which has outside forces (no pun intended) working at moving the water along. She was kind enough to take a short video for me to prove that in fact....the water in Australia does indeed follow the path of northern water...and that is a clockwise rotation.
Should I take her word for it...probably...but just in case she would be tricksy and lie to me...I decided to check out some online sources to see if there was additional evidence to provide credence to her video. I believe that the Library of Congress is a reputable enough source to validate her statement. According to their website:
It all depends upon how the water was introduced and the geometric structure of the drain. One can find both counterclockwise and clockwise flowing drains in both hemispheres. Some people would like you to believe that the Coriolis force affects the flow of water down the drain in sinks, bathtubs, or toilet bowls. Don’t believe them! The Coriolis force is simply too weak to affect such small bodies of water. (source)It is safe to say that water in both the northern and southern hemispheres can and do drain clockwise.