Jackery sells a 1KWh power station for about $1K or a little less. With new batteries.
The Nissan thing is way overpriced.
Um, no.
NIF uses an entirely different method to heat and compress the fuel: rather than magnetic confinement, it is inertial confinement. The magnetic field helps to keep the heat in the reaction volume, not to compress the plasma, as all those you cited do.
This will create space between the membranes to allow heat to radiate out, making each successive layer of the sunshield cooler than the one below..
While there may be a little contribution from radiation from between the layers, the sunshield works from a different principle. Multilayer insulation does not require a side opening where the extra energy can "radiate out." cf. Liquid helium containers, which use multilayer insulation wrapped entirely around the inner container.
Multilayer insulation works because radiative power between two surfaces of different temperatures goes like the fourth power of the temperature. Each intermediate layer radiatively comes to an equilibrium temperature lower than the one next to it, closer to the heat source, and that fourth power of the temperature takes over and dramatically reduces the radiative load. The radiative power is additionally reduced by using high-reflectivity (i.e. low-emissivity) coatings on the layers.
JWST has the additional advantage that the telescope itself is facing deep space, so that it radiates power away. That's why everything on the cold side (excluding the mirror) is black; it maximizes the radiated power.
> On average, a star weighs around 2.2x10^32 pounds (10^32 kilograms)
It's amazing to me that science journalists (or their editors) completely don't understand significant digits or orders of magnitude in estimates. The average for these purposes is the same for pounds and kilograms!
Science journalism keeps getting worse and worse.
One question that the article (and press release) pointedly ignore is what is to be done with the paste that has released its hydrogen and "broken down?" It's not clear whether the resulting material will still be pastelike, but any service station will necessarily have to deal with it.
Two of these large boosters, each with a mass of 1.6 million pounds
You'd think they would try to make the rocket a little lighter. That's lot of mass to orbit and doesn't even account for the fuel!
The described phenomenon is a quasiparticle, not an actual particle. There is an important difference. So no, the authors did not discover axion particles; instead, they made axion quasiparticles.
The discovery of an actual axion would be big news; to me, this discovery is more "meh."
Such high-energy gamma rays will rarely, if ever, make it to the surface of the Earth. The cross-section for scattering in the atmosphere is high. Unlike charged particles, gamma rays become less penetrating as their energy increases above about 1 MeV. It's because of pair production.
NIST would be more appropriate, methinks.
Some of us (e.g. anyone who works for the federal government and many federal contractors) are required to use the cheapest available tickets. It's not like we have a choice. The airlines, in pursuing lower base ticket prices at the expense of even minimal service, have completely screwed us, because we have to buy them.
I'm very tall (2 m) and regular economy seats are, quite literally, torture. I succeeded in convincing my organization to let me upgrade to Economy Plus (or the equivalent) by claiming that, for me, it's an ergonomics issue. But it took months of fighting.
Wow. Who could possibly have seen this coming?
(yes, that was sarcasm)
WAAS doesn't know about atmospheric corrections.
That is incorrect. WAAS stations create a model for the ionospheric propagation delay over the entire network and use that to provide corrections for receivers located anywhere in the area covered by the network.
WAAS also provides corrections for ephemeris and clock errors.
It's fantastic to hear that Art finally won the Nobel though - many of us were wondering how long it would be before he did!
Indeed he does deserve it. His tenacity is legendary. SNO is amazing.
Oh, and I now feel ever so slightly more important, as he was my thesis advisor.
Umm, no. The Ice Cube detects neutrinos, not cosmic rays. Completely different thing.
When you make your mark in the world, watch out for guys with erasers. -- The Wall Street Journal
