Dec 14, 2010 #1 D Dandy New member May 27, 2008 7 0 1 Why does a balloon float above a heating vent? It is full of air not helium. When placed on the floor heating vent instead of being blown away by the forced air, it bobs up and down above it.
Why does a balloon float above a heating vent? It is full of air not helium. When placed on the floor heating vent instead of being blown away by the forced air, it bobs up and down above it.
