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CENTRIPETAL FORCE
Unit 14 Dr John P. Cise, Professor of Physics, Au=
stin
Com. College,
1212 Rio Grande St., Austin Tx 78701 jpcise@austincc.edu & NYTimes April , 2010 by Dennis Overbye=
Please send me a e-mail explaining =
the
context in which you used this NYTimes Physics application. Thanks! Dr Cise=
Seeing What the Hubble Sees, in Imax =
and
3-D
What goes through an astronaut’s head when th=
ings
go wrong, and he is floating in space 350 miles
above the Earth?
<=
/span><=
/span><=
/span>
Multimedia=
INTRODUCTION(CONTINUED=
FROM
ABOVE): The supplier of the centripetal force here is
gravitation. Fcentri=
peta
needed =3D M2V2/ R
QUESTION: S=
how
that the Hubble telescope must travel at
~ 16,975 mph in order to stay in orbit at 350 m=
iles
above earth?
HINT: 1609.=
34
m/mile, 2.237 mph =3D m/s , Solve in mks system and then
convert back to the English system.
|
|
Slide Show
The Universe, in Hi=
gh Definition
Video
Six days into a mi=
ssion
last May to repair and rehabilitate the Hubble
Space Telescope, Michael J. Mas=
simino,
an astronaut, robotics expert and honorary New York City fireman, was getti=
ng
ready to rip a handrail off the side of the fabled telescope. Beneath the
handrail, behind a panel secured by 111 tiny screws, was a broken spectrogr=
aph
needing electronic repair to go back to its job, which included inspecting
faraway planets. Dr. Massimino had trained for years to do this on-orbit
“brain surgery,” but first, having stripped a crucial bolt, he
would have to resort to brute force.
Dr. Massimino̵=
7;s
thoughts, he recalled recently over lunch in New York, flew back to his boy=
hood
and the day his Uncle Frank couldn’t get the oil filter off his car. =
At
one point, his father ran across the street, came back with a giant
screwdriver, and punched it through the filter to get leverage to pry it of=
f.
After yanking, and cursing, “Finally he got the thing to budge,”
Dr. Massimino said. “That’s what I was thinking when I was yank=
ing
on the handle on the Hubble.”
He has been relivi=
ng that
moment in talks and interviews for the last year. Now, the whole world can =
as
well.
When the Atlantis,
commanded by Scott D. Altman, shipped off from Cape Canaveral, in addition to seven astronauts and thousands of poun=
ds
of tools and replacement instruments, it carried a special 575-pound Imax
camera that recorded the action, including Dr. MassiminoR=
17;s
cosmic yank, in 3-D. On March 19, 2010 “Hubble 3D,”
a 40-minute film about the Hubble repair, directed by Toni Myers and narrat=
ed
by Leonardo DiCaprio,
opened in Imax theaters and science centers around the country. =
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