The hot chocolate effect, also known as the allassonic effect, is a phenomenon of wave mechanics first documented in 1982 by Frank Crawford, where the pitch heard from tapping a cup of hot liquid rises after the addition of a soluble powder. It was first observed in the making of hot chocolate or instant coffee, but also occurs in other situations such as adding salt to supersaturated hot water or cold beer. Recent research has found many more substances which create the effect, even in initially non-supersaturated liquids.
Posted 3 days ago by StiflersMom in category: interesting   Comments (0)

Can you guess what it is before it zooms out?
Posted 1 week ago by boyt in category: fascinating   Comments (0)

Posted 2 weeks ago by boyt in category: wtf   Comments (0)

The guy who flew the couch is back with another one.
Posted 1 week ago by DK2009 in category: crazy   Comments (0)