Englerdy's recent activity

  1. Comment on What is watts, volts and amps? in ~science

    Englerdy
    (edited )
    Link
    I'll take a stab at something really short and maybe a bit more conceptual*: Watts: How much energy is flowing every second Volts: How strongly motivated electrons are to move Amps: How many...

    I'll take a stab at something really short and maybe a bit more conceptual*:
    Watts: How much energy is flowing every second
    Volts: How strongly motivated electrons are to move
    Amps: How many electrons are flowing every second


    And then some slightly longer explanations maybe:
    Watts is power transfer which comes from the combination of voltage (motivation for electrons to move) and amps (how many electrons are flowing). Watts can also be used for heat flow (how much thermal energy moves every second) which may or may not be helpful for remembering.

    Voltage is often called a potential. You could almost think of it like a rubber band or spring. Without pulling it has zero potential, but as you stretch it, there's increasingly greater potential energy that can be released when you let it go for it to jump back to its unexpanded state. Voltage relates how motivated electrons are move from a high voltage ("stretched out") to a low voltage (a resting state).

    Amps are measuring the individual electrons as they race from a high voltage to a lower voltage (which is electric current). This is the water in the water analogy. But could also be marbles rolling down a hill. It's counting how many run by every second on their way down.

    You didn't mention it, but thinking of resistance also helps intuition. For the rubber band/spring anology, resistance is kind of like the air the rubber band or spring is sitting in. When the spring gets released, air doesn't really resist it snapping back to its original shape. But if you held the spring in honey or molasses and stretched it, you'd see it contract more slowly because of it needing to move really thick liquid out of the way. Resistance slows down the rate that electrons move from high voltage to low voltage. So for the same voltage, it affects how quickly electrons flow and as a result, how much energy moves every second.

    *Trying to keep this pretty abstract, I know these aren't especially rigorous explanations.

    4 votes
  2. Comment on Empty department stores are housing Cleveland’s booming population in ~life

    Englerdy
    Link Parent
    Looks like these are pretty well executed, at least from an aesthetic stand point. Would be very cool to tour some units like this in person some day just to see what solutions they came up with...

    Looks like these are pretty well executed, at least from an aesthetic stand point. Would be very cool to tour some units like this in person some day just to see what solutions they came up with to work around the prior space use. Thanks for sharing!

    4 votes
  3. Comment on Continous feed pickle jar? in ~food

    Englerdy
    Link Parent
    Mostly Noise But man, why do so many people chose to funnel so much time and energy into just being awful people online? I know that's like, the modern internet in a nut shell, but like, are all...

    Mostly Noise

    But man, why do so many people chose to funnel so much time and energy into just being awful people online? I know that's like, the modern internet in a nut shell, but like, are all these people just as awful in real life?

    6 votes
  4. Comment on Inside Pixar’s scrapped movie ‘Be Fri’ and the “devastating” aftermath in ~movies

    Englerdy
    Link Parent
    Yes! That's it! Thanks for sharing. I had googled around a bit and couldn't find it, but it's been nawing at the back of my head since I'd read the article.

    Yes! That's it! Thanks for sharing. I had googled around a bit and couldn't find it, but it's been nawing at the back of my head since I'd read the article.

    5 votes
  5. Comment on Inside Pixar’s scrapped movie ‘Be Fri’ and the “devastating” aftermath in ~movies

    Englerdy
    Link
    I swear I just saw an ad last week for a movie that feels like it had a very similar premise. Two teen girls, besties since grade school, kind of drifting apart approaching graduation, and then...

    I swear I just saw an ad last week for a movie that feels like it had a very similar premise. Two teen girls, besties since grade school, kind of drifting apart approaching graduation, and then getting swept off into another universe and needing to find get home. It looked like the movie was set in like Hawaii or a Pacific islander nation. Can't think of the name though. I'll come back and edit this if I think of the name or see the ad again.

    All the same, I'm left to wonder if another studio was able to scoop up the idea and maybe some of the creative team.

    13 votes
  6. Comment on Used electric vehicles are a bargain right now in ~transport

    Englerdy
    Link Parent
    Replying to both you and @DynamoSunshirt, that range loss is partly because of battery heating (cold batteries can't supply as much current so keeping it warm in the cold makes sure you cans still...

    Replying to both you and @DynamoSunshirt, that range loss is partly because of battery heating (cold batteries can't supply as much current so keeping it warm in the cold makes sure you cans still accelerate normally), but is almost entirely from running the cabin heater. The car heats using an electric resistance heater and cars don't have a ton of insulation, so you're basically always drawing 1-3 kW for heating depending on how cold it is. That said, you can just turn off the cabin heater if you don't mind the cold. If you were parked in the garage and heated it while parked, you could probably do short trips without getting too cold. In my experience also in a cold climate, the added drain just means I need to charge an extra time during the week. And the extra charge feels worth not being cold while driving.

    I have a 2019 Bolt, but as far as I know none of the Bolts have heat pumps for heating yet which would be much more efficient. I think Teslas and maybe 1 or 2 other manufacturers have heat pumps in their EVs, but a heat pump adds expense over a resistance heater.

    @patience_limited, related to your high level comment, I too wish the Bolt was AWD. Better tired made a huge difference in the snow this year, but that is the one thing I miss about the IC car I sold. It was AWD and handled phenomenal in the snow. The Bolt is certainly capable in the snow with better tires, but it's still not as controlled of an experience when things get slushy or really icy. :/

    1 vote
  7. Comment on Used electric vehicles are a bargain right now in ~transport

    Englerdy
    Link Parent
    I had a similar thought when I initially bought my EV. It's a 2019 Chevy Bolt. It uses a deep cycle lead acid battery (similar to marine batteries, different design from starter batteries for...

    I had a similar thought when I initially bought my EV. It's a 2019 Chevy Bolt. It uses a deep cycle lead acid battery (similar to marine batteries, different design from starter batteries for lower current applications than starting an engine).

    So in addition to what @papasquat noted, I've noticed that it also provides isolation from the high voltage system. When the car is off, I'm pretty sure the high voltage battery is isolated from everything with relays (little electronically activated switches for bridging circuits). So in a sense I think it's also a safety thing so that you can still have power in the low voltage system (for lights and the computer system) without the high voltage system needing to be engaged.

    4 votes
  8. Comment on Donald Trump says it's 'not possible' for the US to pay for Medicaid, Medicare and day care: 'We’re fighting wars' in ~society

    Englerdy
    Link
    " I'm starting wars", that makes more sense.

    "We're I'm fighting starting wars", that makes more sense.

    4 votes
  9. Comment on TIL about the Wedge Cat Tour in Minneapolis: the residents put the cats in the window and the crowd stops to admire them in ~life.pets

    Englerdy
    Link
    This feels right up there with Minnesota's gigantic pumpkin boat races: https://www.harvestfeststillwater.com/ They've just got all sorts of delightful stuff going on!

    This feels right up there with Minnesota's gigantic pumpkin boat races: https://www.harvestfeststillwater.com/

    They've just got all sorts of delightful stuff going on!

    4 votes
  10. Comment on Trippy tobacco? Tobacco plants engineered to make five psychedelics at once. in ~science

    Englerdy
    Link Parent
    I'm left to wonder, like for many things in life, what series of events leads people to learn something like the fact that the secretion from behind a toad's eye is hallucinogenic? ತ_ತ

    I'm left to wonder, like for many things in life, what series of events leads people to learn something like the fact that the secretion from behind a toad's eye is hallucinogenic? ತ⁠_⁠ತ

    7 votes
  11. Comment on Backrooms | Official trailer in ~movies

    Englerdy
    Link Parent
    I was skeptical, but now, color me intrigued.

    I was skeptical, but now, color me intrigued.

    3 votes
  12. Comment on Can we talk about rice cookers? in ~food

    Englerdy
    Link Parent
    I came through the comments explicitly looking to find out if it plays music. I have a cheap rice cooker that I'm waiting on to give up the ghost, and getting one that plays music when the rice is...

    I came through the comments explicitly looking to find out if it plays music. I have a cheap rice cooker that I'm waiting on to give up the ghost, and getting one that plays music when the rice is done is an absolute essential feature as soon as I need a replacement. Thank you for including that detail. 😂

    5 votes
  13. Comment on Britain mandates heat pumps and solar panels in new homes from 2028 in ~enviro

    Englerdy
    Link Parent
    In really cold locations where natural gas is cheap (at least in the US), heat pumps have had a hard time competing because of how much cheaper natural gas is than electricity. That said, paired...

    In really cold locations where natural gas is cheap (at least in the US), heat pumps have had a hard time competing because of how much cheaper natural gas is than electricity. That said, paired with a well insulated and well air sealed home they can reach cost parity and even be cheaper than natural gas for heating. But you really have to approach it holistically to get the costs to work out favorably. However if gas prices climb and electricity doesn't increase with it, I think the economics will absolutely continue to favor the heat pumps instead.

    19 votes
  14. Comment on When you were first getting your driver's license, what were you afraid of? in ~transport

    Englerdy
    Link
    Generally very little about driving seemed scary, but I've always like driving things like go-karts so it didn't feel that different. That said, I think the two scariest things both conceptually...

    Generally very little about driving seemed scary, but I've always like driving things like go-karts so it didn't feel that different. That said, I think the two scariest things both conceptually and as I was learning were one-way streets and merging at highway speeds.

    I grew up in suburbs and the idea of navigating one-way roads in the city felt pretty foreign. They're also tighter roads and even with GPS can be tricky to juggle all the visual input. Part of it may have also been anxiety about missing a turn or being able to figure out where I was going. They don't stress me out anymore, but I notice they require a much higher level of focus than driving elsewhere.

    Learning to merge at high speed was pretty scary because it feels like so much more can go wrong in a much more catastrophic way than on slower roads. Still spooks me sometimes, but the issue is usually other people driving recklessly usually.

    2 votes
  15. Comment on The women leaving the new right in ~society

    Englerdy
    Link Parent
    I can't tell if it's just a result of me getting older, but did SNL used to feel more like parody rather than "something that basically happened and it's actually funny because of how absurd it is...

    I can't tell if it's just a result of me getting older, but did SNL used to feel more like parody rather than "something that basically happened and it's actually funny because of how absurd it is that it's true"? Or is it really a product of modern times where current events just feel like parody as a baseline? ಥ⁠_⁠ಥ

    7 votes
  16. Comment on BYD claims five-minute electric vehicle charging with new battery tech in ~transport

    Englerdy
    Link Parent
    That's more straight forward than I was trying to interpret it to be. Thanks for clarifying!

    That's more straight forward than I was trying to interpret it to be. Thanks for clarifying!

    1 vote
  17. Comment on BYD claims five-minute electric vehicle charging with new battery tech in ~transport

    Englerdy
    Link Parent
    Can you clarify what HV and MV stand for?

    Can you clarify what HV and MV stand for?

  18. Comment on BYD claims five-minute electric vehicle charging with new battery tech in ~transport

    Englerdy
    Link Parent
    1,500 kW (1.5 mega watts) is a crazy amount of power! O.o I suppose it's only delivered for 5 minutes, but that's a bananas level of power delivery to charge a battery. I'm not super familiar with...

    1,500 kW (1.5 mega watts) is a crazy amount of power! O.o I suppose it's only delivered for 5 minutes, but that's a bananas level of power delivery to charge a battery. I'm not super familiar with industrial power needs, but I feel like a device that draw 1.5 MW is in a category of its own. Pretty impressive!

    6 votes
  19. Comment on BYD claims five-minute electric vehicle charging with new battery tech in ~transport

    Englerdy
    Link Parent
    Honestly increased availability at just random places around town would really help make it possible for people to have an EV even without over night charging. In my case (I've also met two other...

    Honestly increased availability at just random places around town would really help make it possible for people to have an EV even without over night charging. In my case (I've also met two other people in a similar position), I have level 2 charging (~6 kW) at work and so once a week I plug my car in for the day and leave juiced up. If people had abundant access to chargers while grocery shopping, working, going to the gym, etc., needing to charge at home is a non issue because you'd be able to constantly pick up range while getting around town. We're definitely not there yet either, but having access at work has meant an EV is still pretty convenient even without home charging to me.

    4 votes
  20. Comment on A top US counterterrorism official resigns, citing the Iran war in ~society

    Englerdy
    Link Parent
    Honestly I think the last one is probably the most likely for the bulk (not to say that any of them being pedos or threatened is impossible, but I doubt it's true of the majority). Which honestly...

    Honestly I think the last one is probably the most likely for the bulk (not to say that any of them being pedos or threatened is impossible, but I doubt it's true of the majority). Which honestly is kind of the most depressing one too. Partly because it also includes their apparent apathy to pushing for justice against actual predators by going along with everything.

    7 votes