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Posted by Marc Christiansen on 12/05/07 13:38
Jerry Stuckle <jstucklex@attglobal.net> wrote:
> Marc Christiansen wrote:
>> Jerry Stuckle <jstucklex@attglobal.net> wrote:
>>> Marc Christiansen wrote:
>>>> Jerry Stuckle <jstucklex@attglobal.net> wrote:
>>>>> Toby A Inkster 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).
[...]
>>> 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.
>
> OK, but he wasn't looking at one lightyear per fortnight (which violates
> most current laws of physics). He was looking at a light fortnight -
> the distance light travels in a fortnight.
Huh? Diving a length by a time span violates laws of physics, just
because the length is expressed in lightyears or the time span in
fortnights? And he was talking about "millilightyears per fortnight" and
the speed limit on UK's motorways, so he definitely did not mean a
distance.
Marc
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