Re: New comer
From: Michael Varney (varney_at_colorado_no_spam.edu)
Date: 06/15/04
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Date: Tue, 15 Jun 2004 10:01:54 -0600
"Kuki" <kukiyky@hotmail.com> wrote in message
news:can559$g84$1@justice.itsc.cuhk.edu.hk...
> Hi all, I am a new beginner in Relativity.
> I have got some enquiries about this topic, and hope you can give me some
> guidances on those problems, thanks!
>
> 1. We all know that light travels more slowly in glass than in air, so can
I
> say this contradict the thoery of special relativity?
No.
>
> 2. If 2 people both walk north at the same rate from 2 different places on
> the earth's equator, what happens to the separation distance between 2
> people?
Is this a homework? Get a globe and take a look. What is their separation
when they reach the north pole?
>
> 3. Is there anywhere on the earth so that every step I take from that
place,
> I am walking towards south?
Yes.
>
> 4. Is a clock always running slower when seen by a moving observer?? Also,
> is it always true that a rod will appear shorter when it is moving
relative
> to the observer?
www.google.com "how to use google"
> 5. If some radioactive materials, which undergo nuclei decay and release
> energy, are encased in an perfectly insulated blanket, I guess there will
be
> an increase in temperature. Then does the mass of the radioactive material
> and the blanket change?
Yes.
> Thanks for answering!!!
>
>
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