You need 1.25 kg of gas. Candles don't consist solely of oxygen, the ones the Russians use utilize lithium perchlorate (LiClO4). When they finish burning, you are left with a lithium chloride ash (LiCl), which will be 40% mass of what you started with.
It works out to be more efficient, at least in terms of mass, to send up large tanks of compressed gas instead.
And the 1961 fire that killed cosmonaut Valentin Bondarenko in an altitude chamber. The Soviets covered it up until the 1980's, so NASA made the same mistake.
Candles are useful when oxygen has been consumed because of respiration or a fire. They're not useful in a leak.
Conservation of mass: if a cubic meter of air escapes, that's 1.25 kg, and you need at least that much in candles. (You actually need 2 kg because the candle isn't solid oxygen)
There's ultimately 1.2 t of atmosphere on the ISS. This will also result in a pure oxygen atmosphere, which is dangerous. You need nitrogen.
Because it's not an actual investment and can't run out. Like US Social Security and many other national schemes, the UK is pay-as-you-go. Money coming in is immediately paid out.
Any funds lying around are supposed to be for temporary imbalances, but became significant due to a major demographic imbalance: the Baby Boom.
You don't have it "now" unless you didn't upgrade to 26.3.
But yes. The only way you can resize windows through System 7 is the resize widget. You cannot grab anywhere else and drag. They couldn't afford the extra chrome pixels, again, on a 512 x 342 screen.
As they should. There are fundamental differences in hardware and capability between 1992 and 2026.
The most immediate are pull-down menus at the top of the screen. They work good on a 9 inch screen, they are awful with 27 inch displays.
Another related change are modal dialog boxes. When you have a 9 inch screen you're fundamentally looking at one document in one app at a time. When you got 2 27's that's not true anymore.
Not for the majority of retirement savings in the US, where Social Security makes up only about 25%.
In the case of 401(k)s/DC plans and private pensions/DB plans, the government allowed savings without "confiscation," i.e. immediate taxation. They gave us the benefit of deferred taxation if you wait until retirement age.
Logistics requires lots of humans, and worse, humans traveling. That's inherently risky and a difficult physical job. People simply would rather have an information economy job like a software developer where the danger is a severe coffee spill.
The humans who do work in logistics have been demanding higher standards of living and therefore better pay and healthcare in first-world countries.
UPS drivers are unionized in the US and their cost to the company (salary + healthcare + pension) is now over $170,000/year each.
Original 1984 critical hardware: the box has an EEPROM module, you swap it on the plane.
FMS (which requires monthly nav data updates) and all modern hardware: the box can be updated over the ARINC 429 serial bus or Ethernet (newer systems/planes), called dataloading
Dataloading had different methods. A320s through the 2000's, most airlines had a 3.5 floppy disk drive on board (Airbus FDDU), and a mechanic fed floppies in. It was slow. Evolution of that was a USB port that took a flash drive.
Most current planes of older models just got rid of on-board dataloading. The mechanic uses a laptop with a cable or purpose-built tablet and plugs into a port. The mechanic can download the software via Wi-Fi or cellular onto the device: https://www.teledynecontrols.com/products/hardware-systems/p...
Airlines can indeed buy a on-board box that connects to Wi-Fi and LTE at the gate which downloads software. This is standard for the latest models that produce more data (A350, 787), but optional for older models. The mechanic still needs to go to the plane and push the buttons to tell it to load.