On 11-06-21 10:44 AM, Jed Rothwell wrote:
I wrote:
He figures 1 m of hose has 0.051 square units of surface, which I
guess are supposed to be square meters. Anyway, I get 0.24 m^2.
Pretty sure that's right.
Oops. Sorry, you are supposed to use the radius, not the diameter.
Radius is 1.85 cm (assuming GoatGuy is right about the OD)
Radius is 1 cm, actually, as he assumed the OD was 2 cm. Specifically,
he said:
I estimate the output hose is 2
cm outside diameter. Inside diameter is 1.25 cm.
So (external) surface area per meter is 2 * pi * R * L = 2 * pi * 1 *
100 = 630 cm^2.
1 m^2 = 10,000 cm^2 so that's 0.063 m^2.
So, you're both wrong.
so surface area is 0.12 m^ per meter of hose.
- Jed
