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Posted by Marc Christiansen on 12/05/07 11:04
Jerry Stuckle <jstucklex@attglobal.net> wrote:
> Marc Christiansen wrote:
>> Jerry Stuckle <jstucklex@attglobal.net> wrote:
>>> Toby A Inkster wrote:
>>>> Rik Wasmus wrote:
>>>>
>>>> ____
>>>> 1. It is noteworthy that the UK's motorway speed limit (70 miles/hour) is
>>>> almost exactly 4 millilightyears per fortnight (it's about 4.0009353).
>>>>
>>> Toby,
>>>
>>> With a claim like that, I had to check it. I think your figures are a
>>> bit off.
>>>
>>> 1 light year is about 5.87849981×10^12 miles. In one fortnight that
>>> would be about 225,322,374,647 miles. 1/1000 of that would be
>>> 225,322,374 miles. I think you'd have to be going a lot faster than 70
>>> mph to get that many miles in a fortnight. :-)
>>>
>> What did you calculate to get 225,322,374,647 miles? 1 light year *
>> 26.09? If yes, why?
>> But Toby got it slightly wrong too. 1 light year per fortnight is
>> 5.87849981×10^12 miles / (14 * 24 hours), about 17495535149 miles/hour,
>> so 70 miles/hour are about 4 nano light years per fortnight.
>>
>> Ciao
>> Marc
>>
>
> Either of 2 ways - 5.87849981×10^12 / 365 * 14 or 186 282.397 * 60 8 60
> * 24 * 14. Both give similar answers.
>
> But you're wrong - you need to divide 5.87849981×10^12 by 365 to get the
> number of miles in a light day, then multiply by 14 days.
Only if you want the length of a light fortnight in miles. Which is not
the same as lightyear / fortnight. Light fortnight is a length,
lightyear / fortnight is a velocity.
> I have no idea where you got 5.87849981×10^12 / (14 * 24). But one
> light hour is 670,616,629 miles or so.
14 * 24 is the number of hours in a fortnight, so dividing the length of
one lightyear in miles by this number gives me one lightyear / fortnight
in miles / hour.
Marc
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