Recent comments in /f/explainlikeimfive

NoSoulsINC t1_j2c75x4 wrote

For what purpose? Measuring the air around you at home? Well, almost every house has a thermostat, many smart that you can check on your phone or use a voice assistant. The check the temp outside? Do you want to go outside and let the phone acclimate to get a proper reading when again, you can check the weather app and it would be more informative and accurate? Okay, say you’re in a office building and don’t have access to the thermostat and you’re hot. I guess you’ll just be warm for a few minutes as they aren’t going to adjust the thermostat for you, not to mention it would likely take a few minutes to kick in and cool down.

Not to mention, due to the heat of the phone and it being in a pocket against your warm body, it wouldn’t be very accurate unless you put the phone in an idle state for a few minutes and leave it on a counter.

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IdlePermanence t1_j2c71yx wrote

Neurons are cells. Schwann cells are also cells. Schwann cells surround a neuron and basically work to keep them alive and functioning. There are two types - ones that produce myelin and ones that don't. Myelin is made up of protein and fatty substances.

Say this is a neuron:

O --------X

O is the cell body (where the nucleus is)

-------- is the axon

X is the axon terminal (the end)

Myelinated Schwann cells wrap around the axon of a neuron and form the myelin sheath along the length of an axon. They don't form as one long sheath, there's several myelinated segments along the length of the axon. Wrapping up the axon in this way increases the speed at which a nerve signal gets transferred from one neuron to the next -- this is needed for motor/sensory function so you can react quickly and appropriately in day to day life. For example, knowing instantly to take your hand away when you accidentally touch a hot stove with your bare hand.

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fox-mcleod t1_j2c5yyc wrote

Because phones get hot.

They do have thermometers. Several of them in fact because a lot of integrated chips come with them. But they tell you the temperature of the chip in order to prevent it from overheating.

In general, you’re not going to find an external temperature sensor in any electronic device that isn’t designed for it because you need a large empty space around it — and phones are jam packed with battery capacity and antennas wherever they can fit them.

Any temperature sensor is going to be more likely to tell you the temperature of your screen, battery or hand than of the room it’s in.

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dkf295 t1_j2c5xx4 wrote

Having a thermometer that can measure ambient air temperature (that being, the air around you, not the air in/on the phone) would require having some sort of probe jutting out of the phone, which is not something people want on their phones. Putting one just on the surface of the case without jutting out a lot means that what it tells you the temperature is will be heavily impacted by the internal temperature of the phone, how you're holding it, etc.

Phones DO have thermometers internally to monitor how hot for example, the CPU is getting.

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ProveISaidIt t1_j2c5l6k wrote

The other thing to consider is loss leaders. They may take a small loss on say a desktop computer, but they are counting on selling you a monitor, maybe you upgrade to a wireless mouse and back-lit wireless keyboard. They make money on those.

Sticking with the laptop example your going to want a cooling pad, a carrying case, an external hard drive to back it up. Even if you don't think you want those a good salesman will convince you that you do. You also need an extended warranty, maybe you want in home service for 3 years for an additional $500 (yes, oddly specific. I received a Dell laptop for my birthday with 3 year in-home service).

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Taira_Mai t1_j2c4c7x wrote

>Part of that is also that prosecutors are pretty good at identifying and excluding potential jurors who are likely to hold out for ideological reasons.

Defense attorneys as well - those who argue a lot of cases know how to spot the person who could be a thorn in their side.

As the old law school joke goes "If you have the law on your side, hammer the judge, if the facts are on your side, hammer the jury, if you have neither, hammer on the table!"

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jacksaff t1_j2c4bti wrote

It's not the weight of the fuel fighting against gravity that is the problem. It is the inertia of the fuel preventing you from accelerating your rocket up to orbital speed. The main effect of more gravity is to increase the required orbital velocity. You need to go even faster, requiring more fuel, requiring even more fuel to accelerate the fuel and so on.

There will be more loss fighting gravity if the earth were bigger, but it is the increase in required final velocity that makes it impossible to achieve orbit with chemical rockets in this case.

Accelerating stuff at ground level definitely helps - see Spin Launch. Unfortunately, Earth having an atmosphere places a big limit on how fast you can get until you are above most of the air. You could spin launch to orbit (with small rocket corrections) on a huge planet, as long as there was no atmosphere. You could even launch people if you had a long linear accelerator rather than a spinning one.

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ProveISaidIt t1_j2c47gn wrote

You could have micro-tears in your skin that will alow dirt, germs, bacteria and other pathogens entry into your system.

Athlete's foot is a fungus. Walking barefoot either allows you to get the fungus on your feet or spread it if you already have it.

Then there are the other hazards, broken glass, nails, sharp or hard items.

I got a shard of glass in my foot from a broken plate. It would move in and out of my foot. It took 3 weeks to finally get it removed.

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Redditfordatohoneyo t1_j2c3y4n wrote

Brain injuries have to be the biggest one. In the past humans have to have noticed that even a swift smack upside their own head would let you know the difference when you're feeling foggy and out of it. But certainly cases like Phineas Gage and others must've been relatively common place; where an injury had made noticeable differences in before and after.

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Throwawaycuzawkward t1_j2c3hqo wrote

It wasn't a stupid question, my response was. And yes: Carbon is central to the chemical bonds that make up everything meaningful in your body: proteins that help repair wounds and your farts. Literally everything.

There's a specific kind of Chemistry, you can get a very expensive degree in it that those that have it generally call: O-Chem, Organic Chemistry, and it is specifically about the chemicals and chemical reactions made up by Carbon, essentially.

Like I said, Science has been down that rabbit hole, for about 90 years in fact. I know you can't see it with your eyes, but we can see it with chemical reactions, and Electron Spectrometry, and a bunch of other stuff.

There's several robots on mars currently that are looking for - and have found - chemical signatures of life there, all of them based around carbon-bonded compounds.

I would encourage you to go look into basic chemistry - not because you're basic, but because you are obviously curious, and a little understanding of how atoms are made up will make it clear to you, I think, why Carbon is, in fact "the glue" in the organic chemistry of life.

Best of luck, friend.

1

usrevenge t1_j2c2xwg wrote

You sell computers for $300.

You spend $200 on the computer.

So you make $100 per computer.

You sell 10. So you made $1000.

You drop price to $250.

You sell 30 computers now.

You made $1500 this time.

Companies find the point where their product maximizes profit. You can't sell for less than $200 or you make $0. But if you sell more than $300 almost no one buys any so you make no money.

Some companies will try a loss leader which is a product sold for a loss but you end up buying other stuff when there. Like if McDonald's sold a 8 piece nuggets for $.50. They might lose money but they are getting most people get fries and a drink while there as well so they make money.

For computers and computer parts most items are way cheaper at the OEM level. Dell pays significantly less for parts than you will pay. Things like windows 11 will cost almost nothing to them compared to retail purchasers.

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boytoy421 t1_j2c2ccl wrote

Well yeah but we're assuming increased gravity so the weight of the fuel makes that prohibitive. I'm saying if you had that restriction I think you could get around it (inefficiently) by using a separate ground based 1st stage to get closer to that 27000 kmh without having to carry the fuel on the "1st stage"

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Jf2611 t1_j2c28h8 wrote

A few things at play here. Number one is buying power. These large manufacturers buy some many components that they pay much less than the average wholesale price. They also have "proprietary" components that may use a lesser material to make it more affordable. An example would be motherboards in a Dell or HP - they are notoriously difficult to upgrade because they are proprietary and don't have room for much else.

The second thing they have going for them is volume of sales. They sell such a large number of products that they are able to take less margin and still turn a profit. Walmart is a perfect example of this.

Lastly, you should see a theme here, is scale of production. They produce so many of the same or similar things that they can take advantage of efficiencies in mass production. Think of a smaller boutique manufacturer, their price is usually a little higher because they are hand made to order products - a feature they try to sell you on. Someone like Dell or HP has thousands of the same laptop sitting in a box ready to be shipped out.

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coyote-1 t1_j2c22wv wrote

I kinda disagree with the conclusion drawn in your question. The mind is not exclusively the brain. There is no question that without the brain there is no mind, this is true…. but the mind is incomplete without the various other ‘messenger’ systems in the body.

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jacksaff t1_j2c1ufb wrote

The problem with getting to orbit is that you need very high velocity to stay there. Altitude and atmosphere resistance are much less relevant than speed.

People often get the idea that if you launch from 15000m up and flying at several hundred km/h, you are a long way towards space and above a lot of the atmosphere. Unfortunately, overcoming altitude and the atmosphere are fairly small fractions of what you need to stay in orbit. You need to accelerate to around 27000 km/h to achieve orbit, so the benefits of a high launch are not as great as you would think. You are generally better off with a bigger rocket launched from the ground.

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