南瓜的热力学
最新答案：2007年10月22日
问：
在硬匹配期间，壁球球的表面将热身至45℃的平衡温度。如果集会保持漫长而艰难，则保持这种温度。我的问题是南瓜球内部的温度是多少？这就是我所知道的。外部温度= 45c内部temp =？外部直径= 40mm内部直径= 38mm的橡胶导热系数= 0.2瓦/度kelvin，任何帮助或指针都将不胜感激。
- 法拉兹·侯赛因（25岁）
伊利诺伊州南瓜俱乐部，伊利诺伊州皮奥里亚
- 法拉兹·侯赛因（25岁）
伊利诺伊州南瓜俱乐部，伊利诺伊州皮奥里亚
A：
法拉兹 - 好问题。
想象一下，您是球内的空气分子。The only things you would bump into, other than air molecules like yourself, would be the walls of the ball, at 45 deg C. So you and your fellow molecules would also equilibrate at 45 deg C. Sometimes that’s called the "zeroth law of thermodynamics"- that any two objects in equilibrium reach the same temperature. If you get a chance to take a course on thermodynamics, you will probably see how it can be derived from the Second Law of Thermodynamics, the basic principle that entropy always increases.
迈克·W。
想象一下，您是球内的空气分子。The only things you would bump into, other than air molecules like yourself, would be the walls of the ball, at 45 deg C. So you and your fellow molecules would also equilibrate at 45 deg C. Sometimes that’s called the "zeroth law of thermodynamics"- that any two objects in equilibrium reach the same temperature. If you get a chance to take a course on thermodynamics, you will probably see how it can be derived from the Second Law of Thermodynamics, the basic principle that entropy always increases.
迈克·W。
（发表于2007年10月22日）