sodawater
sodawater
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May 6th, 2014 at 8:03:24 PM permalink
There's an astronaut floating motionless in an empty part of outer space, nowhere near any major sources of gravity. Floating next to him is a steel pole that is 6 trillion miles (6x10^12) long, with a flag at the other end. The astronaut pushes the pole (he's really strong). How long does it take for the flag to move?
BleedingChipsSlowly
BleedingChipsSlowly
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May 6th, 2014 at 8:11:28 PM permalink
Sometime next year, relatively speaking.
“You don’t bring a bone saw to a negotiation.” - Robert Jordan, former U.S. ambassador to Saudi Arabia
sodawater
sodawater
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May 6th, 2014 at 8:14:36 PM permalink
Quote: BleedingChipsSlowly

Sometime next year, relatively speaking.



Nope.
BleedingChipsSlowly
BleedingChipsSlowly
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May 6th, 2014 at 8:16:46 PM permalink
Quote: sodawater

Nope.

I'm calculating the time it would take for the reaction traveling at the speed of light, 186,000 miles a second. Not right?
“You don’t bring a bone saw to a negotiation.” - Robert Jordan, former U.S. ambassador to Saudi Arabia
sodawater
sodawater
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May 6th, 2014 at 8:17:55 PM permalink
Yup, incorrect.
Ibeatyouraces
Ibeatyouraces
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May 6th, 2014 at 8:19:06 PM permalink
deleted
DUHHIIIIIIIII HEARD THAT!
sodawater
sodawater
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May 6th, 2014 at 8:20:03 PM permalink
Quote: Ibeatyouraces

Never



Haha... why never?

I will specify that at some point after the astronaut pushes the pole, the flag at the other end does move.
Ibeatyouraces
Ibeatyouraces
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May 6th, 2014 at 8:23:05 PM permalink
deleted
DUHHIIIIIIIII HEARD THAT!
BleedingChipsSlowly
BleedingChipsSlowly
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May 6th, 2014 at 8:27:31 PM permalink
How about the flag moves one year after the action, since it it is on a one light-year long pole, but it takes two years for the astronaut to see that movement.
“You don’t bring a bone saw to a negotiation.” - Robert Jordan, former U.S. ambassador to Saudi Arabia
sodawater
sodawater
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May 6th, 2014 at 8:31:45 PM permalink
Quote: BleedingChipsSlowly

How about the flag moves one year after the action, since it it is on a one light-year long pole, but it takes two years for the astronaut to see that movement.



The astronaut can't see it at all... he is too far away.

Assume I want the answer from the flag's point of view. Assume that through some pre-arranged method (like observing an equidistant third party), a stopwatch at the flag is started the instant the astronaut pushes the pole.

Here's a related question that might help you.

Say you're in a hot air balloon over Earth and hold a steel broom vertically out of the basket. You let go of the broom stick from the top of the stick. How long does it take for the head of the broom (the bottom) to start falling?

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