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The fact that aircraft get lighter as they burn fuel increases their effective range since a lighter aircraft requires less fuel to fly.


It's also important as most long range airliners take off with more fuel than they can safely land with. The air frames are very heavily optimized as every pound matters. If you always landed with the same weight you took off with, you'd end up needing to make the landing gear and surrounding structure significantly stronger to prevent excessive wear over time.


Also landing speeds would have to be higher because stall speed increases with weight. Faster landings are more dangerous.


The earth is at the center of the visible universe.


Only to observers on earth...


Also in the Tycho Brahe system Earth is at the center of the solar system but it is equivalent to the Copernican one, you can just change the coordinates.

https://en.m.wikipedia.org/wiki/Tychonic_system


And that was a complete mess if a system when you start considering moons orbiting around planets orbiting around the sun orbiting around the Earth. Not to mention anything outside our solar system.


I don't know what point you are making. That's how observation works... The observer is always at the center of their own universe.


Infinite.


The first generation were definitely first world only, but it looks like there are variations being developed that are more appropriate for less developed areas. The m1283 vaccine is currently under trials and is supposed to be stable at refrigerator temperatures.


I've been thinking about this, then it dawned on me that the current live game has everything in WoW classic, and then everything in every expansion after it. The amount of video and high resolution textures in the current version of the game dwarf the original.


Happens in hardware too: the way Sony made the PS2 compatible with the previous PS ("PS 1") was simply to place an entire first ten playstation on a corner of the PCB. Cheaper and more compatible than writing an emulation mode.

Object encapsulation made physical.


The emulation there was actually a happy accident -- the MIPS processor of the original PlayStation was repurposed as the sound chip for the PS2. Sony realized during development that they could take advantage of the hardware for backwards compatibility for minimal cost.

The PS3 (Emotion Engine) and Nintendo DS (GBA cart slot) are the only consoles I'm aware of that have hardware only for backwards compatibility (although some games used the cart slot for pseudo-peripherals, such as rumble support or a guitar "grip").


The GBA is another example: native games run on a 32-bit ARM processor, but it also includes a Z80 for backwards compatibility with older Game Boy models.


IIRC, the 3DS puts itself into a DS hardware mode when playing those games. It even has a GBA hardware mode, although Nintendo only used this for the "Ambassador" games they gave to early adopters of the console.


Absolutely true.

Of course, it's silly for me to think 5-70 GB in 15 years is a huge jump. Doom 1 (1993) was 2.3 MB, and Doom 3 in 2004 required 2.2 GB.


To me this actually makes me respect beers like Budweiser even more. They've managed to take a fairly temperamental style of beer, mass produce it in breweries spread around the world, and wind up with a product that is damn near uniform everywhere I've ever had it. It's not my preferred style, but I don't think I've ever had a truly bad one.


So for those of us on the east coast, this is what Wawa has been doing for years now. Except now you can't mill around watching them prepare your food.


Yes. We must make sure to reserve such celebrations for truly important things. Like the World Cup and Olympics.


Assuming you're being sarcastic; those are actual competitions between nations, by design. His entire point was that this is not a competition. Obviously, if it were, America would be winning. That's not being contested; the problem is not that the US won, the problem is that by continuing to beat the rest of the world over the head with it they are alienating a large chunk of the world.

The Art Of War, and all that.


Are Europeans so hypersensitive that the we should ban celebrations at NASA?


patriotism in such things as space exploration is laughable, however reasonable commercial reasons behind it are (well described in another post). seeing logic "usa reached pluto" instead of "mankind reached pluto" is a bit sad, and i don't care if it's US, China, India or Monaco spacecraft. it just feels as wrong and antiquated view of the world... but maybe typical to generic US person? (no clue really)


Maybe you don't care, but I am sure that people in US, China, India or Monaco care a lot. And this is a normal view of the world.


well if they care, you shouldn't be then surprised that this approach would go against the fur of quite a few people (safe to say more than 1000% of US population?). and since even people with different mindset, like me, find it a bit distasteful and unnecessary, not-so-positive reactions are to be expected. btw welcome to the internet, where people complain about stupid things, all the time :)


Why, out of all parts of the world, do you bring up Europe specifically?


I wouldn't be so sure about the 'an' before hotel. That may be regional as well. I'm from the southern US and use 'a' there. However, 'an' would be used whenever the 'h' isn't voiced, which in my case would be words like honorable and honest.


You're missing the context of this being grocery items. For most people a multiple day wait for their groceries would be unacceptable.


I've been getting groceries delivered for years now from Peapod (and a brief trial with Freshdirect). We get our groceries delivered two or three days after we place our order - you might be able to get them sooner, but I think it costs more for that option.

You know what we never have to do? Spend more than 5-10 minutes shopping for two weeks' worth of groceries. I don't even leave the couch, and when the delivery person shows up, they take the bags right into the kitchen.

Totally acceptable.


I spend 5-10 minutes deciding which potatoes to buy in a big supermarket. My choice of potatoes will probably be good for 3 meals and I like to get the right ones. I will carry them home, up a big hill with plenty of other food items, by bicycle. I will peel, prepare and cook them with a great deal of care.

The idea of them being bought from some standing order setup on some ipad screen for them to just arrive and be placed into the kitchen is just mind-blowing. I don't know if I could live like that.

In the future houses will have kitchen cupboards that can be opened from outside, probably with some steel shutter/garage door type of arrangement. You probably won't even have to have Mr delivery man step in the house, he will back fill the cupboards and even take away any out of date items for you.


This is not most peoples' grocery shopping experience or expectation.


You know what we never have to do? Spend more than 5-10 minutes shopping for two weeks' worth of groceries. I don't even leave the couch, and when the delivery person shows up, they take the bags right into the kitchen.

Now all you need to do is buy a robot that feeds you and open a hole in your couch to put a toilet in.

But seriously, people need to get out, see the 4-5 types of tomatoes and buy the right ones. Your version works for a subsection of people, most will plan grocery shopping on their way back from work or as family time. you can buy the shampoo and Gillete razors once every few months, but for many things can't beat the 'see, touch and buy. '


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