Remember when Tylenol was linked to autism, crashing the stock price of its maker just long enough for that business to be acquired at a steep discount by its new owner? And how we never heard about a link between Tylenol and autism again?

I wonder which vaccine maker is about to get a hostile takeover?

I wondered that same thing and did a bit of reading about it. My understanding is that Type Ia SNe’s are not all exactly the same brightness, but they can be normalized by measuring how long they take to fade.

From what I’ve read, a Type Ia SNe triggered by a PBH, compared to the usual trigger of accreting gas from a binary companion, would fade faster and observed brightness can be normalized to get an accurate distance measurement.

If your current plan is to buy the latest and greatest phone today, sell it in two years, and then buy a new top of the line phone, then Apple’s new lease program looks like an attractive option. They’ve priced it such that, over the course of the lease, you end up paying about the cost of purchasing the phone minus its resale value. Leasing looks convenient because it saves you from having to find a buyer.

It also keeps phones out of the secondary market, which benefits Apple. Off lease phones are used for warranty replacements, or sold as refurbished through official storefronts instead of person to person.

The unused spool of fiber optic cable maybe?

I haven’t seen any evidence they’re equipped with guns if that’s what you mean.

They probably have a proximity fused HEAT charge in a fragmentation-optimized case.

The resemblance to a WWII-era fighter-bomber suggests it might also be effective in a reusable role, dropping grenades on targets too far away to be hit by quadcopters, and then returning to base.

The airframe reminds me of an Me-262.

Exactly. USAmericans hating one of their oligarchs does not threaten the entire government the way sapping support from the Moscovian petite bourgeois imperils the stability and continued existence of the mafia-State occupying the Kremlin.

Raise your hand if you’re dead ✋

Source for claim of 1% mass loss per cycle:
https://research.tue.nl/en/publications/combustion-of-micron-sized-iron-particles-in-a-drop-tube-reactor/

I think the deciding factor between iron and aluminum comes down to exhaust filtration.

Iron oxide in the exhaust can be collected cheaply with a combination of centrifugal and electrostatic forces and it tends to retain is grain size. Aluminum oxide is lighter, more electrically resistive, and tends to break down into too-small nanoparticles.

Yeah, you’d only need to sinter pellets to pump hydrogen through them in a static pile. A fluidized bed reactor can reduce the iron oxide powder as is, and keeping the temperature lower prevents sticky sintering at the cost of taking longer to complete.

The whole mass of iron powder does not need to be re-ground after every use. From what I’ve read so far, about half a percent experiences sintering and needs to be re-ground, and another half a percent breaks down into too fine of dust and needs to be filtered out of the exhaust, sintered, and then reground. The efficiency penalty of reprocessing the fuel is about 0.1% - 1 kWh of reprocessing for every 1 MWh of generation.

The existing nuclear infrastructure has its own issues, like long term waste management. My understanding is that long lived isotopes can be burned as fuel in fast breeder reactors, and the waste from those is safe in 100 years. Every nuclear power plant having enough cooling pools for 100 years worth of spent fuel is a manageable problem. But I’ve read that somewhere in that cycle some pretty nasty stuff gets generated & if it were stolen it could be used to make a potent radiological weapon. I think that’s why building the things has been a non-starter in USA - we’ve been in a cold Civil War for the last 161 years, and I think MAGA would do a nuclear terrorism if we gave them the opportunity.

But yeah, iron powder is a drop in replacement for coal in stationary, utility scale electrical generation.

Iron powder is easier to transport than hydrogen. Hydrogen needs high pressure, cryogenically cooled tanks. It turns any metal it touches brittle. And it boils off over time, losing some of its energy value during transport and storage.

Iron powder is safer and cheaper to transport than ammonia, which also needs a pressurized tank and would be a major disaster if it spilled. Reprocessing rust back into iron using hydrogen is also orders of magnitude more efficient than converting hydrogen into ammonia.

All iron powder needs for transport is a shipping container full of nitrogen gas, with a rubber gasket to keep it somewhat air tight. If it spills its just a pile of rocks.

And if the source of renewable energy is co-located with the electrolysis plant, the rust recharging plant, and the thermal power plant, the cycle’s excess O2 from electrolysis and nitrogen gas production can be pumped into the burner of the power plant, increasing efficiency and eliminating nitric acid pollution.

That’s true for older magnetorquers, because the Earth’s magnetic field is smooth enough that the difference between field strength at the top and bottom of the satellite is insignificant.

With superconductors you can scale up the magnetic field strength enough to get a usable net linear force.

2 big galaxies collided and shattered into a string of 12 small galaxies.

The dark matter is split unevenly among those 12 small galaxies in an hour-glass shaped distribution: very little in the middle of the string, and most of the dark matter concentrated at the ends.

I love the Kerbal-esque architecture of this mission.

-An ion drive stage drops it down a deep hole, toward the sun, then spends all its fuel slowing down almost enough to be captured by Mercury’s gravity instead of just flying by it at screaming fast speed. The empty fuel tanks and ion engines get thrown away when they’re used up.

-Then one of the stacked probes turns on its chemical engines for the capture burn, and it ditches some of its sun screen.

-When its just barely captured in a highly elliptical polar orbit, it releases a satellite equipped with its own independent systems.

-Then it maneuvers to a lower orbit that’s optimal for the other satellite.

Mercury is hard to get to, and only one other space craft has ever orbited it: MESSENGER. Now there will be 2 more delivered with a single launch.

Would be a lot cooler if they could just fucking not.

It is quite the temptation though. India is buying crude at a discount and selling it back as gasoline at a premium.

Could be propaganda for domestic consumption. Hyping an external threat to induce a rally around the flag.

Finding a dictionary on an asteroid would be pretty impressive, ngl.

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Locking in the gains and taking time to reload and refuel before round 2.

It was also rotated 90 degrees for some reason? The river is on the south side of the community.