After much procrastination (and I really do *not* like the fact that Wollemi was registered as a trademark here in the USA), I finally ordered a Wollemi Pine from the Wollemi Pine North America Website on 1/5/2008, and it arrived via UPS 2nd Day this week on 1/17.ustralia wrote: I bought my Wollemi a few weeks ago at a garden show here in Sydney. For $45 I received a 2 ft tall tree in lovely condition. I repotted it in a good humous soil and decided to keep it in a pot to re use as our Christmas tree in the future.
11â latex balloons generally last between 12â20 hours filled with helium, and about 2â3 days when treated with HiâFloat. balloons last approx. 5â7 days. Airâfilled balloons generally last for a couple of weeks, but will not float.
Balloons filled with helium only float in our atmosphere because the average density of the gas and the balloon itself is less than that of the atmosphere around it. An easy way to show this is to try and put a blown up balloon underwater-the density of the water forces the balloon to rise to the surface. balloon expands to a certain level until the gas inside it is at an equal level of pressure with the gas outside, E.G: There are the same number of atoms bouncing off the inside of the balloon as there are bouncing off the outside, forming a balance of forces.