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You don’t typically use them on something that’s starting from a stop. I think ramjets are common on missiles. I think there are ramjet/scramjet planes which would also use a turbojet engine to get the plane off the ground before switching to the ramjet engine.

I’m pretty sure scramjet engines will have a shockwave inside the engine which will change the properties of the airflow through it. It’s been many a year since I studied propulsion and compressible fluid dynamics so I’m probably misremembering a fair amount of this but after the shockwave the air will flow slower through the engine. I think its temperature and pressure increases across a shockwave while velocity of the air decreases.

The thrust from a jet will always come from pretty much throwing the air out of the nozzle. You only have explosions outside of the engine being used for propulsion in a very specific kind of rocket engine.

You make a site that looked like the original site. But most sites have functionality and forms that are processed by the server.

As an example, I could copy reddit's login page and it would look identical, but I could not actually verify your login, show you your user name, or show you previous messages you posted.

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Many things you learn as impossible in math are possible, just not possible with the current level of understanding. Calculus isn't an end. It is the start of everything. Compared to what comes after Calculus, learning Calculus is the equivalent of learning to count to 10.

Told, you can't divide things by zero. Did this for multiple years in engineering and calculus. We divide by zero all the time.

Told there is no square root of a negative, there is. We called it imaginary, its not imaginary. it exists. We could have called them extradimensional numbers, because that's what they are. Numbers on a different dimensional line than the normal real number dimensional lines. In early school, there is no need to understand this yes as its not something you use in day to day life. Its physics math tool offering a new dimension just like, x, y, z. Now you got xi, yi, zi. That's 3 new dimensions on top of the existing 3 that can used for more detailed information about a point.

Told there is nothing bigger than infinity. There is. 2*infinity is bigger in that is grows faster. Power sets which are infinite sets of infinite sets are bigger as well. You find there is an entire new number line just for the infinite numbers, often called the non-ordinals.

There are lots of solutions for those things learned in the past that had no solutions. The math just wasn't known yet.

you’re thinking of electrophoresis (and techniques that apply this phenomenon such as electroplating), not electrolysis

When you take calculus and differential equations (or Calc IV) Imaginary numbers (and eulers number as well) turn up there are are used in what are called "transforms".

The idea of a transform is: I have this disgustingly difficult calculus problem that is beyond my ability to do by hand. But...... I can transform it into an algebra problem, solve the algebra problem, then transform it back and get an answer that is useful. Yes, these transforms can get very messy on their own because you have to transform the entire algebra equation and take it with you.

The easiest analogy I can think of (and this is imperfect): You have a problem were you need to travel across the US continent, by foot. Walking 3000 miles kinda sucks though. So instead you arrange a plane ticket, fly in the plane, then get off and end up and the same place as if you had walked. There are some different tricky issues with the plane flight (like getting through airport security), but overall it is faster.

In this case, the plane is the transform. And if you have never seen a plane or used one, you look at it and say "what is that big aluminum can, I don't see any use for it"

The sub would have not let me answer your question with just a link, but since this is not a top-level answer, I can.

https://www.nytimes.com/2020/09/04/smarter-living/phone-charging-advice.html

(Internet Archived version with no paywall: https://archive.ph/YqHsD )

Virtually no spirits are bottled at what they’re distilled to. Vodka is typically distilled to above 90% ABV and then diluted with water at bottling.

Two main things impact phone battery life. First is what charge level it is sitting at, it lasts longest hanging out around 50% state of charge(actual charge level not displayed) and wears out a bit quicker the further from that you get. Second and wayyy more important is charge cycles, your battery has a fixed number of times it can get charged up and down. Using 10% and then charging it back up counts for 1/10th of a charge cycle. Using 40% is 4/10ths of a charge cycle.

Your phone shows you the usable range and not the actual charge state of the battery

0% is closer to 20% charge state and 100% is closer to 80% charge state to leave room for battery degradation, prevent over charging, and extend the lifespan a little. Batteries also charge significantly faster in the middle of their range than at the high end so there's a bit of marketing there.

If your phone has a setting to only charge until 80% then you can use that and it'll charge up and hold it there. It will mildly extend your battery life as charge cycles have a significantly greater impact

If your phone doesn't have this feature then manually removing it from the charger at 80% will just increase your charge cycles causing it to wear out faster. When your phone hits full charge it just runs itself off the charger and the battery sits there full, if you're constantly unplugging it when it hits 80% and doing 3% extra of charge cycles every night because of this then after a year you'll have added another 11 full charge cycles and made things significantly more complicated in your life

1. You could copy the design, layout etc. of a website but a bulk of the functionality is usually happening on the server side. You have no way to copy that.
2. Though you can copy it, the content is still copyrighted. A company can choose to sue you and get your site shut down if they want.

I think this guy is confusing a column/continuous still with a pot still. That’s all I can think of. There’s no point to recycling through a column still, while with a pot still you have to distill it multiple times purely to achieve the proper concentration.

Number of distillations is a stylistic choice on the part of the manufacturer; many of the top rated spirits are made on continuous stills rather than pot stills and thus are “only distilled once”.

LOL . . . ya caught me.

You typically need a turbojet or turbofan engine on an aircraft to get that initial forward momentum before you can use a ram/scramjet. They both have a minimum speed required to operate which is achieved with a more typically jet engine.

All jet engines (as far as I know) require compressed air to create thrust. Think like the otto cycle of a four stroke engine, there is a compression stage where the air fuel mixture is compressed. Jet engines also require this compression, you'll see other comments mentioning "compressor stages" on turbojets - this is for the air compression.

The advantage of a scramjet is that supersonic air is already compressed, and therefore required no moving parts and can operate at higher speeds.

I am possibly wrong about some of this, I'm only an aero student sorry!

*its very definition

it's = it is

https://www.grammarly.com/blog/its-vs-its/

Excellent recommendation.

Mmmm nope. I did it as a science fair project back in the day :P

Blasted fruit flies for a minute and not a single dead one.

Infact: the microwaves are just a little bigger than the holes in the window on the front door.

So pretty much anything smaller than those holes cannot be heated by the microwave oven. (in air)

Obviously if you put it in a cup of water the water is going to boil.

You can make a copy, and it will look like the original. But it will all be static, and will have basically no functionality. If this is what you are after (a skeleton which you fill out with your own content), you can do that.

And they do. Mostly for marketing reasons because to charge vattery to 80% takes almost same time as charging from 80 to 100. Thus pr team can claim super fast charging

A lot already do, they just say it's 100% because alot of people would be upset to see that their whole battery isn't being used all the time.

To add one more point, (specifically about tequila) cheap tequila like José Quervo or Sauza are a mix of agavé (minimum 51% in order to be sold as tequila) and grain alcohol. It’s the grain alcohol component that gives it that cheap taste, whereas tequila made with 100% agavé has a smoother more consistent flavour. If you want good tequila make sure it says “made with 100% agavé” on the bottle

Right?? My phone does actually have a setting under battery maintenance to have it only charge to 85% and the people at the Verizon store also told me I'd be better off charging it to 80% and that it wouldn't really affect how long the battery lasted (which makes no sense to me) because that first 15-20% drains so fast? This is why I'm confused.

That would be like stealing a menu from a restaurant and thinking that you could recreate the dishes from it.

To be fair, Euhler's will mess with people's heads, and it's honestly the answer to this question but it sure isn't ELI5 :).