Compare your h to those determined from the published Nu equation. Your values may be lower (or higher). What could cause this and why? Explain this in terms of physical reasoning. For example: There is a hole in the sphere for the support rod. Does this non-brass area affect the time constant. How? Does the rod affect the flow around the sphere? How could that affect the heat loss and time constant? Etc.

h (experimental) for this = 53 W/m^2*k, h published =63