brianorca

@brianorca@lemmy.world

• ⁨Comment⁩ on ⁨Quantum Opinions⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  There a whole branch of quantum mechanics research that’s trying increasingly complicated ways of not looking at the particles while trying to sneak a look.

• ⁨Comment⁩ on ⁨Reef Sharks⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  Blacktip Reef sharks, like some others such as great white and hammerhead, are “obligate ram ventilators” because forward movement is the only way they can push water over their gills. Nurse sharks and some others are able to close their mouth and pump water to the gills while stationary.

• ⁨Comment⁩ on ⁨Cords⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  In AC, diodes work half the time, every 1/60 second. The “good” LEDs will have circuitry to fully rectify the AC into DC, drop the voltage properly, and smooth the pals and valleys, so they will be continuously lit. So the cheap LED Christmas lights might have a slight flicker, and the good ones are steady. (Or get fancy with chasing colors, etc.)

  All of that happens inside each of the “bulb” enclosures, or sometimes in a box at one end, so it technically doesn’t matter which end they are getting electricity from, since the socket at the far end is still just collected in parallel to the plug at the near end. (Otherwise you wouldn’t be able to link them together.)

  It’s just a really bad dangerous idea to reverse them.

• ⁨Comment⁩ on ⁨Cords⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  It would still work. But it is VERY dangerous. 1. The far end of the light string will now have exposed metal prongs that are energized at 120v, which can be fatal. 2. If the other end gets plugged into a socket, there is a 50% chance it will be a different circuit on a different phase, which can create a 240v direct short, across a wire that has no properly sized circuit breaker. 3. Using it to plug a generator into your house during a power outage can kill electrical workers trying to fix the outage if you fail to open your circuit breakers.

• ⁨Comment⁩ on ⁨Cords⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  If someone can’t make the own cord, what’s the chance they know how vital it is to flip the breaker?

• ⁨Comment⁩ on ⁨Cords⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  Two things: 1: there’s a high chance you do cross live and neutral, or even live and live on different phases. 2: using it to plug in a generator to power your house can kill electrical workers who are trying to restore a power outage. (If you fail to open your circuit breaker.)

• ⁨Comment⁩ on ⁨Leaky milk water cheese store bathroom.⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  My guess is that’s how high it needs to be for the sewer to flow in the right direction.

• ⁨Comment⁩ on ⁨Soar⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  It’s because ducks are actually going someplace, while eagles are soaring over a thermal, trying to stay in one spot to watch for food.

• ⁨Comment⁩ on ⁨Is it more energy efficient to charge a phone/tablet using a desktop/laptop while your computer is being used vs using the charger?⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  USB PD (Power Delivery) actually does use a higher voltage for more wattage. Standard USB is limited to 5V at 0.5A and sometimes up to 5V @ 2A on quick chargers. But PD chargers can give 20V and 3A for 60w or even 5A (100w) with properly rated cables. There’s even a proposal for up to 48V at 5A to get 240w. This is all determined by a negotiation between the charger, the cable (which does have a small chip for this purpose), and the device, therefore PD chargers must super multiple voltages.

• ⁨Comment⁩ on ⁨He's not going to go easy on you either⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  But you could still be asked to serve if the case was civil and did not involve cops. There are many reasons you can be dismissed, but it varies wildly from one case to the next.

• ⁨Comment⁩ on ⁨Learn how to count with Bill Gates⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  Replace NT in this list with ME and you have all the consumer versions. NT was the business version in parallel with 3, 95, 98, and ME.

• ⁨Comment⁩ on ⁨Voyager 1⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  Nearly all such satellites would have highly directional antennas, so the aliens would have to be neat earth before they could do that. Voyager is not expecting a command signal from anywhere else but Earth. The signal would have to originate not more than a fraction of a degree from Earth from Voyager’s perspective.

• ⁨Comment⁩ on ⁨kids are gowing up faster and faster⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  And now here in California, they are starting “Transitional Kindergarten” or TK for the 4 year olds, before they go to Kindergarten at five. (More focus on reading and writing than a typical Preschool.) TK is offered at the normal public schools, and at most private schools that have K and up.

• ⁨Comment⁩ on ⁨epidemiology⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  Prions wouldn’t work like that. They would have to be very similar, and the same chirality, as our own proteins, or else the misfold would not self-replicate like prion diseases do.

• ⁨Comment⁩ on ⁨CFCs⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

  Starship, as it is right now, is already a better rocket than SLS. It can already carry more mass and be cheaper (even fully expended) than the SLS’s 4 billion cost per launch.

  It will get better. Falcon 9 didn’t land the first time either, but now it has successfully landed more consecutive times than any other rocket has flown.

  There’s nothing wrong with saying this is a test. This is only a test, and we don’t expect it to be perfect yet. Each time they learn from the data. And SpaceX hasn’t repeated the same mistake twice.

• ⁨Comment⁩ on ⁨Waka waka⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

  I doubt the atmosphere had much chance to break it up much since it was 10-15 km wide. Not like the little Chelyabinsk.

• ⁨Comment⁩ on ⁨Suboptimal⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

  The skin of that cowling doesn’t look thick enough to do more than streamlining. You’re thinking of the containment ring found in jet engines.

• ⁨Comment⁩ on ⁨It's dangerous to go alone. Take this.⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  I mean, when you wake up normally “fully refreshed”, how long can you go? 16-17 hours is all I get. The description doesn’t say you don’t get tired, just that there’s a 20 hour cool down.

• ⁨Comment⁩ on ⁨It's dangerous to go alone. Take this.⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  But when you wake “fully refreshed” you are only good for the next 16 hours. Then you will be tired like any end of day, and it of sync with everyone else’s schedule, and still have to wait for the 20 hour cool down.

• ⁨Comment⁩ on ⁨It’s currently 2-1 to the Jarvis family in the Christmas card count. They haven’t lived here for at least 12 years.⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  Probably a serial number for the stamp. In the US, you can even pay online and print your own stamp, and it uses the barcode to track when you use it, so it can’t be used twice.

• ⁨Comment⁩ on ⁨Why isn't a wired mouse connected through the keyboard?⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  Interference is a legit issue, especially if there is an active USB3 port near the mouse dongle. This is because USB3 specifically does create some mild interference near the 2.4GHz range used by the wireless mouse. The back ports of the motherboard also sit with the metal box between the dongle and the mouse, blocking some of the signal. Using a box-front port, or a keyboard port as your did, helps separate the dongle from potential interference sources.

• ⁨Comment⁩ on ⁨Choose wisely!⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  The gifts of gab.

• ⁨Comment⁩ on ⁨Choose wisely!⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  They still don’t have ears. You can talk to them, but they can’t hear anyone else.

• ⁨Comment⁩ on ⁨Choose wisely!⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  As soon as you leave the ground, you start gaining downward velocity every millisecond that you don’t teleport. Eventually, that velocity will exceed the distance you can teleport no matter how often per second you can do it. Then you hit the ground quite painfully.

• ⁨Comment⁩ on ⁨Choose wisely!⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  But would they though? It would be more like “see Sam over there, yeah he has a great pearl. But not me, I’m sure. Nope, no way.” The clam sure doesn’t want you putting that knife in to get the pearl.

• ⁨Comment⁩ on ⁨Google Disabling Phone 2 Factor?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  To be fair, customer support is often the way hackers bypass these protections.

• ⁨Comment⁩ on ⁨Google Disabling Phone 2 Factor?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The SMS vulnerability is not because of your apps. It’s because of the LTE protocol itself. It can be intercepted or redirected without touching your phone.

• ⁨Comment⁩ on ⁨Living in privately rented homes linked to faster biological ageing, study finds⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Most states in the US have similar laws. Typically requires 24 hour notice, can be delayed by the tenant’s request, and must be during business hours. (With exceptions for emergencies such as a fire or water leak.)

• ⁨Comment⁩ on ⁨Creators of Slay the Spire will migrate their next game to a new engine if Unity doesn't completely revert their changes⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Pantone suddenly decided to assert copyright and licensing to the literal names of colors in a way the broke art files going back decades.

• ⁨Comment⁩ on ⁨How did people refer to clockwise movement before the invention of the clock?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  It wouldn’t be that hard. Once you get a clock like this with the reverse movement, you can just open the face glass, remove the hands, and print a new graphic for the background.