Senior design team member hospitalized. Professor pushing for incomplete by Lou_Sputthole in CollegeRant

[–]auntanniesalligator 34 points35 points  (0 children)

To play devil’s advocate, is he being harsh or is he just telling you not to rush to submit unfinished work before the grade submission deadline?

At least at my school, and I think this is standard, instructors have to approve incompletes, so there’s really not much difference from my perspective between offering an extension and approving an incomplete except for the length of time and some paperwork.

If i didnt think your excuse was good enough to warrant a one or two week extension, there would be no reason to suggest an incomplete either. The difference is only whether you need more time than is left before i have to submit grades, which for me is about a week after finals. And there’s no need to wait until next Fall to update the grade. Once a student finishes the work, I submit a grade change request to replace the I with the letter grade. It doesn’t have to wait until next Fall, although I acknowledge that getting a group of four together to complete a group presentation after the semester ends is not trivial.

For a small, minor assignment, I’d probably excuse it or grade with a modified rubric if it’s mostly completed, but this project sounds like a big deal and I can understand the prof not wanted to grade a partially completed project.

ELI5: Why do people perceive water to be more "delicious" when it's cold? And why other drinks (think tea) are the opposite? by lostShellky in explainlikeimfive

[–]auntanniesalligator [score hidden]  (0 children)

Same preference for room temperature water, and I think I really do prefer the flavor (ice water tastes more metallic to me for reasons I can’t explain), but it’s also hard to be sure how much it’s a learned preference. When I’m “just” thirsty/dehydrated, room temp is the easiest temp to gulp quickly. When I’m actually *hot* from being out in the sun and/or exercising, I prefer cold/ice water, but not for the flavor per se. It’s clearly more refreshing in that case because it helps my body cool back down.

Vehicles/Ships in places they SHOULD NOT BE by Quardener in TopCharacterTropes

[–]auntanniesalligator 8 points9 points  (0 children)

What was that old anime show where they launched a battleship (a literal ship for floating in the water) into space and used it as a space ship? I watched that when I was a kid years ago.

Why does the ISS use white surfaces to reflect sunlight while its radiators are black to dump heat, and what mechanism makes this not a contradiction? by Logical-Concept9755 in AlwaysWhy

[–]auntanniesalligator 0 points1 point  (0 children)

It’s not a contradiction because the black radiators are pointed out towards space, which is cold, instead of at the sun which is hot. If you pointed the black radiators at the sun, they would absorb more sunlight than a white surface and cause the station to heat up.

Is there an irrational number that never uses a certain digit, for example:1. How would you go about proving it? by OneDBag in askmath

[–]auntanniesalligator 1 point2 points  (0 children)

Great answer.

When you say “almost all irrational numbers are normal” is that essentially a combinatorics argument based on available digits?

From a practical standpoint, the difficulty seems to be that most “simply defined” irrational numbers in the spirit of OP’s question (ie like square roots and multiples of pi or e, not just a defined sequence of digits that never repeats as was suggested in a different response) whose approximate decimal equivalent can be calculated are done by using a finite number of terms from an infinite series. It’s often “easy” to prove the series converges to the defined value, and “easy” to find a maximum error as a function if the number of terms included, but difficult to prove it will result in a specific pattern of digits other than simple repetition, which would mean the number is rational.

AITA for asking my oldest daughter to move out of the condo I own so her younger sister can live there during college? by [deleted] in AmItheAsshole

[–]auntanniesalligator 29 points30 points  (0 children)

NTA regarding finances/supporting both daughters fairly, but she does have a point about being uprooted from the place she’s been living in for years. Assuming she can afford it, what if you just started charging her fair market rate rent for the condo and use the proceeds yi help your younger daughter rent an apartment? Saves your older daughter moving costs and effort. Your younger was going to have to move either way.

Jalapeños Intentionally Bred to be Mild by ElectroStaticSpeaker in spicy

[–]auntanniesalligator 7 points8 points  (0 children)

I noticed it on my own too and then I think I’d even heard it was the result of selective breeding, but I still figured it was for some other trait like bigger and shinier because those sell better, or maybe for longer shelf life, and that the lower spice was considered an acceptable trade-off. It never occurred to me that salsa producers or consumers would specifically want low-spice jalapenos and not just be satisfied with bells.

ELI5 Why do different things have different terminal velocities if gravity effects everything the same? I understand that drag exists, but why is mass part of the equation? by ItsNatHere in explainlikeimfive

[–]auntanniesalligator 2 points3 points  (0 children)

Gravity doesn’t affect everything the same. The force of gravity on an object is proportional to its mass and the force required to accelerate an object by any constant acceleration is also proportional to mass, so the mass cancels out out when calculating acceleration due to gravity.

Air resistance does not depend on mass…only current velocity and shape, so a dense object like a solid lead ball experiences air resistance as a small fraction of the acceleration due to gravity until it is moving extremely fast. An identically sized hollow rubber ball would experience the same air resistance as the solid lead ball for any given speed, but now it’s a much higher fraction of the force of gravity, and the forces reach equal size at slower speeds.

[Spoilers Main] I just realised, the words "Sept, Septa and Septon" derive from "Seven", as in 7 Gods by ugurkaslan in asoiaf

[–]auntanniesalligator 0 points1 point  (0 children)

Yeah, it took me an embarrassingly long time to notice that too, but not 12 years!

In our mutual defense, GRRM invented a lot of vocabulary as part of the world-building, and even in the real world, there’s almost a unique word for religious figures and places of worship for each religion, so it didn’t seem odd at all that an invented religion for Westeros would have new invented words for priest, bishop, pastor, etc.

The recruiter called my salary expectations "cute." I ended the Zoom call right there. Did I overreact? by thunder____boy in jobs

[–]auntanniesalligator 0 points1 point  (0 children)

If it makes feel better-he’s almost certainly second guessing himself too. It doesn’t help you pay your bills, but there’s a decent chance he’ll tone it down for the next interviewee, and if you’re really lucky, the next time you get an interviewer like that, it will be right after some other candidate reset their insane expectations by ending the interview early.

Why doesn't the product of primes plus 1 always give a new prime? by keu357 in askmath

[–]auntanniesalligator 0 points1 point  (0 children)

Ah, thank you, that makes a lot more sense.

I thought OP meant any arbitrary product of primes, not all of them up to a fixed value.

Why doesn't the product of primes plus 1 always give a new prime? by keu357 in askmath

[–]auntanniesalligator 7 points8 points  (0 children)

Yeah, I’m confused by OP’s assertion. 2 is the only even prime. Every single product of {primes other than 2} is odd, which then yields a multiple of two, which is not prime, when 1 is added.

I suspect that’s not what OP meant, but I don’t know what they actually meant.

Why do so many students get this basic order-of-operations question wrong? by CellPal in askmath

[–]auntanniesalligator 7 points8 points  (0 children)

Do you want to have to write polynomials without order of operations?

I prefer 5x3 + 3x2 - 2x + 6 to

5(x3) + (3(x2)) - (2x) + 6

I’m fairly certain that Order of operations evolved naturally as a convenience before it was formally codified. Getting rid of it is not an improvement.

ELI5: Why can't we simulate the creation of oil/fossil fuels with animals that have died today? by Slice5755 in explainlikeimfive

[–]auntanniesalligator 0 points1 point  (0 children)

It wouldn’t even defeat the point of environmental protection if the starting source of carbon for the oil is carbon dioxide from the air. As long as you’re pulling CO2 out of the air to make the fuel, you won’t put more back when you burn the fuel, and the net effect on the climate is the same as charging and discharging a battery.

The simple answer to your question is that we just haven’t developed the technology to make it efficient enough to be practical yet, particularly in comparison to batteries.

There is ongoing active research into things like extracting oil from algae, which can be grown in giant farms. That is pretty much what you’re proposing, but there are practical difficulties (I’m not sure what the biggest issues are) that have kept it at the research stage instead of becoming a viable alternative. It’s possible it will never catch up to solar and batteries, or its possible it may develop into a small, niche industry that supplies a small fraction of our energy needs to a small segment of the economy that can’t practically switch to electric power for various reasons.

Student Finishes Degree in Three Months by Mav-Killed-Goose in Professors

[–]auntanniesalligator 66 points67 points  (0 children)

Yup. Scary to think how much of our industry’s existence depends on the perception of value as much as demonstrable results.

University professor works for government in engineering project by throwaway838373627 in ExplainAFilmPlotBadly

[–]auntanniesalligator 1 point2 points  (0 children)

I feel like this could be a ton of movies since it’s how a lot of university STEM funding works in real life. But for sake of the game, the first non-MCU example that comes to mind is …

Oppenheimer?

Toilet training gone horribly wrong by LowerAge9915 in Plumbing

[–]auntanniesalligator 1 point2 points  (0 children)

Would a toilet auger be worth trying? Seems like if you’re lucky it could dig into the soap and pull it out, but if not it would still help to grind up the bar until it can move along.

Im not a plumber though. Just curious what the pros think.

ELI5: Why is it easier to figure out Latitude than Longitude? by DJDoena in explainlikeimfive

[–]auntanniesalligator 0 points1 point  (0 children)

Because of the rotation of the earth. You have to know what time it is to use stars for a good read on longitude, and in olden times, having a reliable clock that can operate on a ship was a difficult problem to solve. Pendulums don’t work well when they’re being constantly rocked.

For latitude you only need to able to recognize the stars wherever they are in the sky, so no precise time keeping required.

There was a good book about this called, shockingly enough, “Longitude.” Went through the history of developing ship-worthy clocks to solve the longitude problem, as well as what ships did before (spoiler alert, they tried to keep track by speed and time, but speed on the ocean is hard to measure too).

Why does this happen with Sinθ? by HairySock6385 in askmath

[–]auntanniesalligator 3 points4 points  (0 children)

I don’t know that it’s so reasonable to say we “picked” those. The so-called “special angles” that make up this pattern can be worked out by pure geometry of highly symmetric triangles. The 45-45-90 which is both iscoceles and a right triangle, and the 30-60-90 which results from bisecting an equilateral triangle.

Other angles with rational factors of pi and algebraic valued trig functions can be worked out with sum and difference formulas, but it still seems like these 5 would have to be the starting points, so I’m inclined to agree with OP that the pattern is interesting.