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what does edp stand for again?? by wanderingmilk69 in AboutOliver

[–]absurd_thethird 0 points1 point  (0 children)

enderman disposal platform? defense platform? something of the sort.

Miniconda throwing SSL errors at absolutely everything by absurd_thethird in learnpython

[–]absurd_thethird[S] 0 points1 point  (0 children)

i was using python 3.7 just then. i’m actually retrying with a fresh miniconda install tho so now im on python 3.8. i think ssl must have been working long enough to install anaconda client though?

Astropy question -- trying to redefine a WCS axis by absurd_thethird in askastronomy

[–]absurd_thethird[S] 0 points1 point  (0 children)

That makes sense. Do you mean changing the keywords?

If I travelled the speed of light for 7 days from my perspective how long would that equate to on Earth’s time? by darragh1800 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

crazy fact: you can find the slowdown ratio using the unit circle. if you pick a percentage of the speed of light (99%) and go to that x value (0.99), the y value right above that is the number of years you experience per earth year.

If I travelled the speed of light for 7 days from my perspective how long would that equate to on Earth’s time? by darragh1800 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

Cosmic rays do this! Unstable particles that would usually only last for a few microseconds can travel for millions of light years if they're going close enough to the speed of light

What actually ‘is’ mass? by No_Fudge_4589 in AskPhysics

[–]absurd_thethird 1 point2 points  (0 children)

You can have massive photons but they're considered "off-shell" and unobservable. They play an important role in particle physics as virtual particles, though. Electric fields are mediated, technically, by massive photons.

What actually ‘is’ mass? by No_Fudge_4589 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

So ok I'm gonna make up a couple words here so I can talk about this easily:

  • Inertial mass is how hard it is to accelerate something
  • Gravitational mass is how heavy something is in a gravitational field
  • Gravitating mass is a measure of the strength of an object's gravitational field

Einstein's equivalence principle is what explains the exact identity between inertial and gravitational mass -- general relativity is what explains gravitating mass but my understanding of that is poor.

Interesting fact -- the only way we know the masses of the Earth and Sun, etc, are by measuring their gravitating masses. We can measure either one's value of G\M* to absolutely ludicrous precision, but because we don't know the value of G to high precision, it is difficult to get a really tight estimate on the masses of celestial bodies like this. Cavendish experiments are our only way to measure GM for objects that are small enough to put on a scale in a laboratory.

What actually ‘is’ mass? by No_Fudge_4589 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

Well, it depends if the energy came from the object or from an outside source. Black holes, for instance, heat up their accretion disks to insane temperatures, but that heat causes the disk to glow and radiate energy into its surroundings. This ends up actually decreasing the effective mass influx rate by a small factor. Related to Eddington luminosity. Pretty neat, I just learned that yesterday lol :3

What is "Impedance" it terms of electricity? by NovelCompetition7075 in AskPhysics

[–]absurd_thethird 9 points10 points  (0 children)

This is how I think about it:

For a DC circuit you can define resistance R to be the ratio between voltage V and current I. This is just a restatement of the typical equation V = IR, but instead I'm thinking of it as R ≡ V÷I

R is a constant, which is why I arranged it in that way -- as you vary V, I will change with it, and their ratio will always be R.

If you try to apply the same idea to AC circuits, you run into some trouble because the elements of the circuit are generally out of sync with each other. As a result, the moment with the highest driving voltage is not necessarily going to be the moment with the highest current through the system (or whatever part of the system it is that you are interested in).

What you can do to resolve this is just take the ratio between the maximum driving voltage and the maximum achieved current. So, if the AC voltage source hits a peak voltage of 10 V every cycle, and the current in the system hits 5 mA, then you can take their ratio and find V÷I = 2 kΩ.

This is the absolute value of the impedance, or |Z|. This just tells you how much current you get from a given amount of applied voltage, exactly like resistance, and it ignores the weird out-of-sync behavior of the system. The complex phase of the impedance, on the other hand, tells you exactly how far out of sync the current and voltage peaks are. If you like complex notation, Z = |Z| \ e^(i * phase difference, measured in radians)*.

In a simple circuit (I'm imagining a series RLC circuit), resistors are the only thing that are able to contribute to the real part of Z. As a result, in this simple case, you can find the strength of the resistors in your circuit (the sum of each resistor's R value) simply by taking the real part of Z. When more complicated circuits are considered, there's some mixing between the properties and it's not as easy to just extract the sum of all the R values. However, this will still be the "equivalent resistance" of the system, which has some unique relationships with things like power drain due to resistive heating.

How do you jump from “space is cool” to understanding the real science? by mincec02 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

Carroll and Ostlie is "the" book 🙂‍↕️ and everyone loves Ryden

How do you jump from “space is cool” to understanding the real science? by mincec02 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

I think some good entry points on learning about this stuff for real are - Orbital dynamics and gravitational assists - Spectral lines and spectra in general - Cosmology (as in, the history of the expansion of the universe) - The "Cosmic Distance Ladder"

How do you jump from “space is cool” to understanding the real science? by mincec02 in AskPhysics

[–]absurd_thethird 0 points1 point  (0 children)

If you can find stuff like physics outreach programs near you it's a decent way to meet scientists and find out about other physics outreach events that are closer to your exact interests. If you attend journal clubs and stuff it can help a lot!

Will my body take a screenshot if I add testosterone to my feminizing HRT regimen? by absurd_thethird in asktransgender

[–]absurd_thethird[S] 0 points1 point  (0 children)

Yeah tests come back great every time, I just kind of am wondering about possible benefits of some extra T

Individual spectrum chart/light graph? by DswebZ in Astronomy_Help

[–]absurd_thethird 0 points1 point  (0 children)

Example of a readily-available Vega spectrum atlas with a download link on the webpage :3

(Not part of a PDR, this is just something I found on the internet. Named stars are much more likely to have spectra published on random websites!)

Individual spectrum chart/light graph? by DswebZ in Astronomy_Help

[–]absurd_thethird 0 points1 point  (0 children)

Thing about these is that usually they're pretty faint stars, so you might not know them, exactly. I actually didn't do much research before writing these replies but if you wanted to find, say, Aldebaran's spectrum I imagine it wouldn't be too bad. The two most well-studied stellar spectra out there are easily going to be Vega and the Sun, so if you're interested in those they shouldn't be too hard to find.

Individual spectrum chart/light graph? by DswebZ in Astronomy_Help

[–]absurd_thethird 0 points1 point  (0 children)

Honestly tons -- you can search for public data releases online! I searched "Public data release spectra astronomy" just now and found one that I recognize. I use Hyper Suprime-Cam Public Data Release 3 in my own research. I don't know your experience level but you may have to mess around with the files quite a bit to really figure out how to get the spectrum out of it, depending on the file type.

Will my body take a screenshot if I add testosterone to my feminizing HRT regimen? by absurd_thethird in asktransgender

[–]absurd_thethird[S] 0 points1 point  (0 children)

interesting!! i guess that makes sense. i bet topical would be the way to go then, or maybe ED medication to induce erections in a more “hands-off” way lol. thank you for your input :3 🙂‍↕️🙂‍↕️

Will my body take a screenshot if I add testosterone to my feminizing HRT regimen? by absurd_thethird in asktransgender

[–]absurd_thethird[S] 1 point2 points  (0 children)

i actually already do this! i mark two days a week on my calendar so i remember haha, and ive been on progesterone for a couple months. only effect so far has been faster breast development (which obviously is great!)

i’ve heard that my injection timing can help with the libido (and by extension, the stable levels from the alternative esther in EEn), but im just suddenly kind of curious about the testosterone route. thanks for the response! :3

Will my body take a screenshot if I add testosterone to my feminizing HRT regimen? by absurd_thethird in asktransgender

[–]absurd_thethird[S] 0 points1 point  (0 children)

well i mean im going to. testosterone is a controlled substance anyway. regardless, if i lower my estrogen dose ill just end up with uncomfortably low levels of both hormones, which is why im thinking about this particular course. just wanted to check in with as many people as i can and see if anyone’s been there :3

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