Not quite, the true invariant quantity is the magnitude of the spacetime 4 vector, which depends on rest mass.

https://en.m.wikipedia.org/wiki/Four-momentum

It actually goes further than that. In spacetime you’re always going the same speed, the more in space, less in time.

At least from the special relativity perspective.

That seems around what I’d expect the measurement error to be anyway

We caused, indirectly or even directly, many of the causes that people are trying flee from in their home countries in Latin america.

The vast majority of them are trying to flee gang violence.

It really does read like an ad, which is amusingly ironic since linux mint is free.

I think it depends, farsighted? Probably not.

Nearsighted looking at things hopelessly out of focus and not trying to look, perhaps.

I’m very nearsighted amd taking my glasses seems to make them relax, since nothing will be close enough to make them focus.

Somebody that’s farsighted might strain their eyes to focus without their glasses.

They will be safe to eat indefinitely, but may not be palatable, depending on how it’s stored.

I personally disagree, Bard feels very uninspired, and copilot i associate too mich with flying, and also sounds more competent than it is.

ChatGPT is probably not the best name, but at least it’s unique.

The cost to benefit looks way better if you think long term. Especially with climate change on the horizon to compete with planes but emission free.

One of the major problems for upgrading lines is straitening the route, and people fight the emniment domain way harder than they do for roads.

I’m not disagreeing with that, but high speed rail from Boston to Miami would be extremely practical. Efficient, fast, convient travel along that corridor reducing dependence on cars for city to city travel. And the area has both the demand and density to support such projects.

And while its impractical now, if it was built to cheapen regional travel in the region it could grow to high use spurning economic development.

I’d love to take a train at a reasonable pace from near to DC to my family in Pittsburgh, or to visit New York.

I might even enjoy a cross country trek to the rockies for skiing on a train, but it’s never going to be an option.

East coast united states has similar population density to most of europe.

It’s just out west we have a lot of empty land.

The average car age is 12.5 years, so many of them are likely approaching 20

Yeah and that’s why I’m not advocating for 100 year cars.

I’d be pretty happy with 20 years to, but 10 just feels like planned obsolescence.

I also messed around with the math very loosly, and only accounting for crashes that total a car, they could be expected to go 20 years or more on average.

And that’s now with all the terrible driving that happens, especially at night. With slight deacrease in accident frequncy that number can increase a lot.

So maybe 30 is a bit much for now, but I’d still like an ev that would claim to last 20 yeara.

So far most ev batteries do much better than cell phones, as long as they have cooling.

But you still have it backwards.

We could very easily design and build a car that lasts 30 years. But we don’t, because manufacturers don’t want them to last that long.

Evs don’t have transmissions, or complicated engines, and the wear on brakes is much less with regenerative braking.

Other things like air conditioning and interior coverings could be easily servicable

Why should the life of an ev by limited by its battery?

Because lemmy search sucks. Its very specific, and usually the most relavant stuff is buried by tangetially related things.

Do really need need 4?

If you cant get by on 2, you might have less power, but you can get better efficiency. With better efficiency you can have a smaller battery for the same range and reduce some of your increased cost that way.

If you’re gonna go through all this trouble, why not put motors directly into the wheels? Then you can bypass the drivetrain all together and directly power the wheels.

The newer technology at that time was cars and roads, and many European countries did try the American system of roads and suburbs.

Its just that most of them realized it wad a bad idea around 20 years ago and started rethinking their cities.

Many city centers were even turned into parking lots like American ones.

Again cities arent supposed to be static, and normally they grow denser, rather than sprawling.

The problem with American cities is partly zoning, and partly nimbyism, where people don’t want their places to change.

And sprawl sucks for pretty much everyone. Less arable land for farming, poorer anmeties, longer travel times, and finally huge transportation costs. Cars are by far the most costly method of travel, both personally and for governments.

The stupid thing is that fixing it isn’t even that hard.

Step one Get rid stupid zoning laws like single family housing and reduce parking minimums.

Step 2 Modify existing roads piece by piece to include alternative transit methods. Add bike lanes, if you can’t slow down roads and people will bike.

Actually run decent buses where peoole want to go, not oversized 50 person buses on 3 routes that nobody uses becasue it doesn’t go anywhere, and has an hour between the next bus.

That’s it, the market will build more housing in areas that need it if its profitable, then use that new tax money to drive transit infrastructure.

There’s a lot of fine details, but we’re bankrupting cities with cars right now.