Thanks for the answers.
What about weapons grade material? (the second part of the question).
Does it generate more energy than what it took to separate it?
All those certifuges must eat up a lot of power!
How much energy does it take to create fissile material?
What is the ratio of energy that it takes to make reactor grade material (3% enriched) to the amount it generates?
What is the ratio for weapons grade material (90%)?
Does it take more...
My very beginner level understanding is that the rubber band's tension stems from it's particles being held together by it's electric bonds: Atoms and molecules are bound together by their electric charges.
And so, When I stretch a rubber band, I am presumably pulling it's particles away from...
Reading about gravity waves got me back to thinking about relativity. And I am left with two questions to which I don't know the answer...
Question 1. Gravity waves ripple through the entire universe. They will not cause any macro scale effects because local changes to space-time are very...
1. Let's say the distance to the black hole is 100 meters.
2. The tape accelerates to speed V and position X (Did I push it, or was it being pulled?)
3. I measure the meter mark on my end. (at my observation point)
4. I repeat 1-3 99 times.
5. Now comes the last meter. Does it accelerate more...
So far we have dealt with 2 classes of objects:
One that does not accelerate: This is the observer. (is it standing still? Is it orbiting the black hole, or being pulled inside at a lower speed?, I'm not sure that it matters [does it?]).
The other object starts moving wit a higher speed towards...
I would have to divide by 2C as the light travels in both directions, and what are the complications? Does anything else take time besides the passage of light through space? Does it take time for the mirror to locally start reflecting light? I do not understand?
I thought according to the...
The ruller is a further abstraction on the tape measure. It was said that a tape measure's length would converge on some value. The length of the tape measure is determined at rest. That's when they print the markings on it at the factory. As such, it's length would not converge, but rather...
I think I finally understand it. If I stop using tape-measures and rulers to define length, and go back to using the speed of light...
1. I drop a mirror with a clock towards a black hole.
2. I fire a laser at the mirror.
3. I measure the amount of time it took the laser to return to me.
The...
BTW, thanks again for taking the time to untangle my thoughts.
Yes, It does. This is at the heart of what's twisting my brain :smile: : At the beginning of the thread, I suggested using the speed of light as a definition of distance. However it was suggested that I use rulers instead. If a...
Hi, I am still reading stevebd1's link. However this thought experiment has me vexed:
To paraphrase: Say I am standing outside the black hole, and I drop a chain of 1m rulers towards it in freefall. (Thereby eliminating any rigidity of said tape measure and dividing it into discrete units, )...
Didn't want to change the observer's position by coming closer to the black hole. Having something orbit the black hole at the speed of light seemed "cleaner", as I could measure how many times that object revolves around the black hole without comming any closer myself.
This depends on how...
R1 and R2 are such distances (they pass through the black hole). I can however deduce them by measuring circumference: R=C/2Pi. I would measure this circumference using the amount of time it takes an object to orbit it. That way I can deduce R2. However, as I approach the black hole wouldn't the...