3 ms·
Does that seem hard? I think it’s hard. The relevant physical phenomena include at least.., In most engineering problems, the starting point is recognizing tha
by andy99 7mo ago
Does that seem hard? I think it’s hard. The relevant physical phenomena include at least..,
In most engineering problems, the starting point is recognizing that usually one or two key things will dominate and the rest won’t matter.
- pablocorbani 7mo ago[dead]
- JKCalhoun 7mo agoYeah, I was thinking the same. Surface tension, convection currents? Maybe the author is overthinking it a bit, giving too much weight to small contributors. But that has presumably always been a pitfall for humans: trying to second guess the physical world and sometimes being "non-intuitively" wrong.
- ok_computer 7mo agoLatitude may affect the eddy currents and resulting convective shear on the film surface imparted by angular momentum from the earth’s spin. This is what humors me about analytical minded computation focused people vs dumb simple engineer and physics (practical) people. That is imagining all the infinities of what may change a physical result vs knowing by experience or education. ANOVA: analysis of variance from linear fit parameters will show you in experimental data or simulation the contributing factors. Or you can read a chapter in an undergraduate heat transfer book. Decay rate of (T(t) - T_inf)/(T(0) - T_inf) is probably dominated by the wind speed in your room. For an 8-12oz cup a sphere or cylinder will get you pretty close.
- JKCalhoun 7mo agoGive that, um, computer, an Ig Nobel Prize.