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Using Your Brain — for a ChangeThe conductivity of charcoal is greater than sheepskin, but a lot less than steel. Ask the next firewalker you meet if he's willing to walk the same length on a steel plate that's at the same temperature as those coals! There is an additional factor that physicists call the "Leiden–frost effect." When there is a significant temperature difference between two substances, and the cooler one is a liquid or contains liquid, a thin vapor layer forms to create an insulating barrier that reduces heat transfer significantly. All the evidence I have indicates that a ten foot, 1.5 second firewalk is something' anyone can do, with or without evangelistic preparation, but very few people think they can do. Woman: Some people have beliefs that don't seem to influence their behavior much. For instance, I have a boss who always talks about how people should be nice to each other, but he's usually mean to people himself. How do you explain that? I try to understand how things work, not "explain" them. There are several possibilities ...» |
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