Science & Technology Q&A for Kids (and others) [Part 57]

Stephen Wolfram hosts a live and unscripted Ask Me Anything about science and technology for all ages. Find the playlist of Q&A's here: wolfr.am/youtube-sw-qa
Originally livestreamed at: / stephen_wolfram
Outline of Q&A
0:00 Stream starts
0:47 Stephen begins the stream
1:10 Is there a reason why math has an order of operations, or is it just "because we decided on that"?
24:51 What does a day in the life of a scientist look like?
36:45 ​What is your opinion about reproducible research?
48:47 Stephen, I loved your conversation with Greg Chaitin!!! You made questions that reminded me to the questions that we ask you. Please make some podcast episodes where you have guests to whom you ask questions!
50:30 ​Will teleportation ever be possible, even if only for, say, a photon stream? If so could a probe sent into a black hole be able to transmit back images across the event horizon using this technique?
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[@_ARCATEC_]

Interesting ideas arising around time .💓

[@samsungtelevision695]

Is there anything this man doesn’t do? Great upload Stephen

[@AJwenta]

Lol. I literally paused your talk with Nassim Taleb at the end of part one to ask my question (in the space of predicting phenotypes with genotypes in agriculture then generalized to predictive medicine) and then I resumed to find that part two of your talk was almost centered/ nucleated from this notion/ question.

[@AJwenta]

I had no idea that part two would address the question I asked, especially given part one. It was comically coincidental. Thank you!

[@alexwilson8034]

I’ve had this question forever: what are the SI units for computation? (Juoles, pounds..)

[@KaliFissure]

@Wolfram 👍

[@JmanNo42]

I have a question that probably was explained in grade school, but what is a rotational restframe. To me it seem that the earths rotational restspace defines what is rotating or not, but that also means that it dictate the centrifugal and centripetal force that acts on a rotating object.
Does that mean that the notion of rotation is not meaningful in deep space, but if so what field or property of space is responsible for the rise of centripetal and centrifugal force.
That rotation is relative the gravitational field within earths gravitational restframe independent upon your relative position upon the body and its own rotational velocity is clear. Does not matter if you sit on northpole spinning your chair or at the equator....
Basicly i ask the centripetal force that pull rotational "thingies" apart is it even present far away from any solar system, if so what is it that dictate its presence in the empty space the fix stars?
If so there must be "sort" of an absolute rest space "field" in universe and in conflict with Einsteins theory of relativity?
If this field "which i doubt exist" is present to create the force upon a rotating object in deep space does it have a name?

[@squarerootof2]

There are no centrifugal "forces", only the centripetal force is real and it pulls things always inwardly towards the center, not outwardly, hence its name.

[@JmanNo42]

@@squarerootof2 Well there is a centrifugal effect on a spinning object that make thing upon it strive outward not inward and its get stronger with the diameter "speed" well one could claim its due to momentum and an accelerated body want to keep linear motion but there is certainly nothing striving inward not even a spinning disc itself without some carriage, finally the disc will break apart. And its fragments will have momentum outwards.

[@JmanNo42]

But my question was what is a rotational rest state, "and why is it there".
And i speculate there is no centripetal force and centrifugal effect upon objects in deepspace so there is no rotational restframe any rpm exert no/zero force on the spinning object relative fixstars.
But i can be wrong but then one wuold have to define what make up that deep space "rotational rest space".
What is the property out there that exert the force upon the object.
Well it can't be the fixstars themself, so is it a property from them, or is it space space itself that constitute some sort of field with a restspace in which objects rotate?
That seem to impose some sort of absolute space with a cordinate system.

[@JmanNo42]

Is the restspace defined by solar, system, our galaxy our universe. Well that earths gravitation define the rotational restspace here on earth seem clear to me, "wherever you may reside upon it".

[@JmanNo42]

But then one start to think about things like inertia in deepspace, is it really there or is the inertia a property of trying to accelerate a body within a gravitational field, an artefact created by earth?
I would certainly like to know more about the subject. But i guess not that many visited deep space....