Quote for today:
Equal opportunity means everyone will have a fair chance at being incompetent.
-- Laurence J. Peter (sent by a. h.)
Answers to Your Questions by
Set 1: Questions:
1. Hey Neon is the electric field the same?
2. A little logic..pop quiz
3. Is hell exothermic or endothermic? Support your answer with a proof.
Hey Neon,
Is the electric field outside an infinitely long cylindrical conductor
with a uniform surface charge the same as if all the charge were on the
axis? Why or Why not?? (sent by s.p.)
The electric field outside of an infinitely long cylindrical conductor
with a uniform surface charge is the same as if all the charge were on the
axis.
The electric field at the surface of a conductor is everywhere perpendicular to
the surface of the conductor( if it were not there would be electric field
componenets parallel to the surface of the conductor and these would cause
charges to move, violating the condition that we are dealing with
electrostatics.), thus the lines of force at the surface have exactly the
same
configuration as they would have if they originated at the axis. It is
only inside the conductor that this is not true.
2. Okay, pop quiz:?
A priest was going to a village, and he was told that upon the
path he would come to a fork in the road. At the fork was a house were
two brothers, exactly alike in appearance, dwelled. One brother always
lied and one always told the truth, but both were never at the house at
the same time (But one was always there). One path led to the village
were the priest was headed, and the other to a bad place (where they ahd
to do physics...). The priest can only ask one question. What will it
be?(sent by m.t.)
He asks: "what would your brother say if i asked him where the village was?"
The truth-teller will point to the physics place, because that is what
the liar would say if asked for directions to the village. The liar will
point to the physics place, because he is lying about what his brother
would say if asked directions. So then the priest goes the other way,
and gets to the village.
3. Is hell exothermic or endothermic?Support your answer with a proof.
This is reported as an actual happening...A true story. A thermodynamics professor had written
a take home exam for his graduate students. It had this one question!
(sent by KD@TAMU)
Most of the students wrote proofs of their beliefs
using Boyle's Law or some variant. One student,
however wrote the following:
First, we postulate that if souls exist, then
they must have some mass.
If they do, then a mole of souls can also have
a mass. So, at what rate are souls moving into
hell and at what rate are souls leaving? I think
that we can safely assume that once a soul gets
to hell, it will not leave. Therefore, no souls
are leaving.
As for souls entering hell, lets look at the
different religions that exist in the world today.
Some of these religions state that if you are not
a member of their religion, you will go to hell.
Since there are more than one of these religions
and people do not belong to more than one religion,
we can project that all people and all souls go to
hell.
With birth and death rates as they are, we can
expect the number of souls in hell to increase
exponentially.
Now, we look at the rate of change in volume in
hell. Boyle's Law states that in order for the
temperature and pressure in hell to stay the same,
the ratio of the mass of souls and volume needs
to stay constant.
So, if hell is expanding at a slower rate than
the rate at which souls enter hell, then the
temperature and pressure in hell will increase
until all hell breaks loose.
Of course, if hell is expanding at a rate faster
than the increase of souls in hell, than the
temperature and pressure will drop until hell freezes over.
It was not revealed what grade the student got.
William J. Siskaninetz '60
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