You’re probably not going to save 95% of the trees given the major earthworks likely needed for managing sewage, stormwater, and other utilities. You’ll probably save most of them, though.
40k looks pretty optimistic for the size and number of buildings, too.
603 for maglevs, 574.8 for steel rail, set in France in 2007 by a hotted up, modified TGV.
China holds the record for a stock train at 487, set in 2010.
(all per Wikipedia)
It looks like the article might be implying that they will be the fastest trains operating in revenue service when they enter service, but that surely needs to be demonstrated with a production train in revenue service.
Depends on the size of the plane. For bigger jets, yes, but for smaller planes the width of runway you need to do a u-turn is about the same as the width you need to safely land of a gust pushes the plane a bit sideways.
Usually you do a 180 rather than reversing blind.
Regular trains don’t run underground. Lots of opencast mines exist .
Basically all mines have an above ground terminal where whatever you mined is unloaded from your underground trains, lifts, haul trucks or whatever else onto storage piles, then loaded onto the actual long distance trains.
If the mine entry is up a mountain, then the trip down from that point will be a net energy producer regardless of anything else.
I wouldn’t be surprised if there are electrified railway lines doing the same. Regenerate large amounts of energy into the grid while descending loaded; consume a relatively small amount of energy to haul the empty train back uphill.
If you’re thinking of that CGI crane lifting concrete blocks, it’s unfortunately a really bad idea.
Pumped hydro stores energy by lifting weight uphill, instead. Water is basically the cheapest thing you can get per tonne, and is easy to contain and move.
To store useful amounts of energy using gravity, you need pretty large elevation differences and millions of tonnes of mass to move.
Converting between Kelvin and Celsius is simple addition; converting between Rankine and Fahrenheit is simple addition. Converting between the two groups requires multiplication, and pre calculator, that’s notably harder.
Also, all your kJ/kg/°C or BTU/lb/°F tables and factors are identical when you swap to referencing absolute zero. If you change to the other unit system, all that goes out the window.
I feel dumber having read that.
Banning a whole country because you disliked a company?
Dealing with stuff that’s ‘almost working’ is often harder than starting from scratch; ask any tradesperson.
They also apparently cannot get their heads around the fact that people might give you a discount if you advertise their brand. Ad-supported pricing has been around for a long time; it’s not some voodoo.
The other scores seem to be more about inherent cursedness, not simply ‘there is a far better option’.
I am very surprised that Rankine gets such a high cursedness score. Isn’t it just the same as Kelvin but based on Fahrenheit instead of Celsius?
Until the day comes that I get a letter in the mail from the government saying, “Here’s how much you paid in taxes, if you’re cool with that then please disregard”, I will not be satisfied.
NZ does that. More accurately, they email you to tell you that there’s a letter available online - I don’t think they send physical mail by default.
Then they pay any refund straight into your nominated bank account.
Agreed, but “I wouldn’t let him past” sounds a lot like deliberate blocking.
Taking the lane shouldn’t be necessary if there are actual bike lanes and you don’t need to turn. This sounds like deliberately blocking traffic.
I do feel that eating a Capri Sun with a fork seems like a better idea than installing a bulging battery in a phone.
It’s also torches and everything after the regulator, which run at much lower pressure. At least in NZ
I think it might be because they’re connected and disconnected regularly so misconnection is a common problem, even with colour coding. Gas work on houses involves actually putting the fittings on pipe and is done by people who should be concentrating more on that rather than on what they’re about to weld/cut.
I’ve heard flammable gas uses reverse (left hand) thread to prevent cross connection. At least for welding gases in NZ; not sure about natural gas.
Any hard drive can fail at any time with or without warning. Worrying too much about individual drive families’ reliability isn’t worth it if you’re dealing with few drives. Worry instead about backups and recovery plans in case it does happen.
Bigger drives have significantly lower power usage per TB, and cost per TB is lowest around 12-16TB. Bigger drives also lets you fit more storage in a given box. Drives 12TB and up are all currently helium filled which run significantly cooler.
Two preferred options in the data hoarder communities are shucking (external drives are cheaper than internal, so remove the case) and buying refurb or grey market drives from vendors like Server Supply or Water Panther. In both cases, the savings are usually big enough that you can simply buy an extra drive to make up for any loss of warranty.
Under US$15/TB is typically a ‘good’ price.
For media serving and deep storage, HDDs are still fine and cheap. For general file storage, consider SSDs to improve IOPS.
I don’t remember if they fully closed the loopholes, but there are inputs that programs cannot catch unless you actually replace the OS.
Everything burns up regardless of size. Big things might not finish burning by the time they hit the ground.
You need either enough thrust to slow you to ~mach 2, or a heat shield to do the same by aerobraking.
It’s called aerobraking for a reason: you’re using friction to turn kinetic energy into heat to slow down, but that heat goes into the air and your heat shield instead of brake pads and rotors.