The 5 Biggest Physics Mysteries #science #physics

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[serphystus]

"according to... me" hahahah I love you Sabine

[robertbridge]

"If you find out, let me know" ya gotta love it.

[RalphTempleton-vrxs]

My take is that there's so much we don't know it's overwhelming, so units of measure are our way of taking information and breaking it down to comprehensible bits we can make sense of!

[webx]

Unit analysis is one of my favorites. I enjoy having a formula build up a certain unit system, and then deconstructing it in a totally different way to see if anything meaningful can be gleaned from it.

For instance, people separate space-like and time-like dimensions with phrases like "the dimensions aren't the same. You wouldn't say 20km in the future".

But you would. Thats c. The speed everything is always going. It's a conversion factor from seconds to meters. 1 second away is literally ~300 million meters in the future. Most of it is just blasting in the time direction.

Or acceleration. Instead of thinking of it as the second derivative of space with respect to time, what if we think of it as space per "area time". Meters per square seconds? What would that tell us about the behavior of multiple time dimensions?

How could torque and energy be related, if they are both in units of N-m?

Or I like to do ridiculous things like "If you slap a chicken inside an MRI machine, does it produce a voltage?"

[erinm]

I'd love to see a full-length video on Koide's formula and the units thing. Such interesting topics, and I've never heard you discuss them before!

[jamesmaybury]

I much prefer the interest and honesty of unsolved problems than the arrogance of ‘what we know’. Thank you.

[ivanastein]

for me, there's also the zeroth mystery: why is there one set of laws for small scale and another for large scale?
As for traveling faster tha light, just fly as close to that speed and hope for a quantum leap. Of course if we afterwards leap back, we're back in time and out of reach (this thanks to the power outage during one of the lectures on something quantum)

[moosewild]

Every time I watch Sabine I'm reminded how little I know. It's good to know we have serious people like her asking the serious questions.

[rmt]

What if entropy moves in a parabola, and we only think it's a line because of our tiny sample size? Universe could have started with high entropy, went to low entropy, then head back to high entropy.

[jarekk.]

The Koide's formula gives us a clue as to what reality actually is. Whoever understands what an electron is, will understand reality.

[drg]

I would like an entire video about Koide

[Tommyr]

#6) Where the hell did my other sock go?!

[seanlefevre]

Honestly I think units and measurements are ultimately explained through a sociocultural lense, rather than a mathematical or physical one, because they are socially and culturally agreed upon observations for use of comparison, but there isn't really anything which is an absolute unit of measure in the universe without the perception of an observer. They are cognitively, psychologically, culturally, and socially constructed.

[harmonyqueue]

Well, here's what I call the Plato's Cave explanation for #5: There are no objective 'units' for anything, as reality is matter -- density, motion, all those wonderful properties -- but much like the prisoners in Plato's Cave watching the shadows and hearing the voices, our conscious capacity to create symbols from our observations of patterns in matter allows us to then use those patterns for whatever purpose we need (survival, curiosity, porn).

Remember that the prisoners in Plato's Cave debated whether it was the shadows speaking, or whether something caused the shadows to be cast while it was also speaking. We know the latter to be true subjectively, but on a purely objective, matter-only basis, the being, the voice, the light and the absence of light are all just matter of varying density and motion and so forth. Measurements aren't inherent to matter itself, but are subjective symbols based on observable patterns in matter of various properties. Hell, our understanding of the properties of matter itself are symbolic of observable patterns in matter.

So, I hope #5 can be crossed off, as it's less physics, more philosophical.

[pierfrancescopeperoni]

I find number 4 particularly interesting: in some way it's not reality itself having a time direction, but rather it's measuring (and in particular perceiving) that requires an accumulation of information, which is in some way related to entropy, so we can only measure things in that order corresponding to increasing entropy. In this sense the whole physics, relying on the possibility of measurement, describes reality as having an orientation in time, which is not real in itself, but it's the only way reality can be measured and perceived.

[dreckajax]

Number one caught me by surprise. It's one of the first questions I remember asking myself when I began studying physics that I never delved into because I had always thought it was a trivial question. Thank you for bringing it back to my beloved collection of things I still have no clue about 😅😅 And thank you very much for everything you do.

[watcher]

I had no idea how cool those questions would be.

[intochill]

You need to make a video with your best guesses or hopes in answer.

[jimsmith]

#5:
Thinking is the best way to travel.

Moody Blues.

[kyleh]

A measurement is energy extracted from a system to reveal the state of the system to an external system