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May 22, 2013
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Bulletin Boards -> New!: Marathon Walkers/Penguins -> Why call it a half Marathon?

Message Category: New!: Marathon Walkers/Penguins
Topic: Why call it a half Marathon?
Reply:
From:
Date:
DTKP and Air vs. a vacuum and Leif vs. Light
Leif
6/11/04 2:17:39 PM ET

To Susan: Yeah, DTKP is more catchy. That's the way to go. Are you in marketing? Sales?

To SMP: Yeah, about 4.5 hours, that's right. (physicist? (sp?) teacher?)

I think it's a fair comparison. My sources say that the relationship between the speed of light in a vacuum and the speed of light in air is 1.0 to 1.0003. You're right that I didn't adjust for this. But I think it's a reasonable approximation for this purpose to say that light travels at "about the same speed" in air as in a vacuum.

However, I'm sure that I would travel much more slowly in a vacuum.

Thus, if the comparison is unfair, it's unfair to my advantage (maybe this is what you meant?). So I'm over 100 million times slower in air and even more slow in a vacuum.

I liked it better when I was just 115 mm times slower....

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