Fermion

joined 2 years ago
[–] Fermion 3 points 1 day ago (2 children)

Why do you perforate the crust with a fork?

[–] Fermion 14 points 2 days ago* (last edited 2 days ago)

I see you've already been told what 4'33" is but I thought I would point out that we are in complete agreement.

[–] Fermion 94 points 2 days ago (11 children)

4'33" by John Cage would be an acceptable addition to this playlist.

[–] Fermion 47 points 3 days ago (3 children)

Isn't this a textbook candidate for a class action suit?

[–] Fermion 3 points 5 days ago (1 children)

The original post gives 12 month forward looking P/E. You linked a 10 year moving average backward looking P/E. So the main difference is in what time period the figure looks at, not in being inflation adjusted.

[–] Fermion 7 points 6 days ago* (last edited 6 days ago)

Are you familiar with the difference between polar (r, theta) coordinates and cartesian (x,y) coordinates? Parabolas are the solution to gravity that is uniform no matter where you sample. It assumes that gravity points in the same direction with the same magnitude no matter where you are. In this model, gravitational acceleration is always 9.81 m/s^2 in the -y direction. That is a reasonable simplification for things that are at the human scale constrained to near the earth's surface. Deviations from air resistance will matter far more than errors stemming from that assumption anyway.

Conic sections are the solutions to gravity that is between two objects where the force is along the line between the center of mass of both objects and the strength is inversely proportional to the square of separation. Now you need polar cpordinates and the direction of gravity changes as things move around. This works pretty well for orbits around the earth and orbits around the sun, because the earth is so much more massive than sattelites that orbit it, and the sun is so much more massive than things that orbit it. If you need really precise orbit trajectories, ellipses aren't truly accurate either. You need to account for all the orbiting bodies in the system. The 3-body problem famously doesn't have purely analytical solutions, and you need to resort to numerical methods to calculate trajectories.

So both solutions come from simplified mathematical models. Despite being simplifications, their predictive power is actually very goood. However, like you are intuiting, it's important to know when those simplifying assumptions lead to errors that start to become important. It's hard to come up with a particular threshold for when you need to switch from one model to another, because it really depends on how much accuracy your application needs.

[–] Fermion 5 points 6 days ago (1 children)

Radon should be yellow. You don't want long term exposure of it in your lungs, but it's still mostly chemically inert and not a significant immediate danger.

[–] Fermion 27 points 1 week ago (1 children)

I know they don't like to read long bills, but maybe one of their interns can read Matthew 6:1-8 to them.

[–] Fermion 2 points 1 week ago* (last edited 1 week ago)

I did search for "weather on the way" in google play store. While they don't have an android app, I found two similar apps that do a lot of what I wanted: "drive weather" and "highway weather." Thank you for the search term that yielded results. I like that the"highway weather" app allows adding in rest stops and propagates the change into the forecast.

I will note that neither of these options seem to offer turn by turn navigation. So there is still room for some of the navigation apps to integrate this functionality.

[–] Fermion 23 points 1 week ago (5 children)

I have long wanted a weather forecast along route in navigation apps for long trips. Ideally you could add in stops and estimate how long you would need to wait for storms to pass over.

[–] Fermion 5 points 1 week ago

This an assembly specifically designed to spread out heat, applying heat to the pipes will just make the whole thing hot. If you did take a giant blowtorch to it and got it hot enough to soften the pipes, you'd probably dry out the pipes (potentially explosively).

Heat pipes are cold worked in the factory. The metals chosen are ductile. Adding lots of heat will only add to the problems.

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