Radioactive Dating Game - PhET Contribution
Play a game that tests your phet radioactive dating game answers ability to match the Answer key available to classroom instructors with verifiable email addresses. Phet radioactive dating game, intro to half life phet lab radioactive dating. The Macintosh is a family of personal computers designed, manufactured, and sold by Apple . However, Jef Raskin had adopted the "Macintosh" spelling by , when the Macintosh computer was still a single prototype machine in the lab. . Infocom had developed the only third-party games for the Mac's launch by . Abiogenesis, or informally the origin of life, is the natural process by which life arises from . This has been supported by the dating of Ga-old zircon crystals from metamorphosed quartzite of Mount Narryer . Studies of meteorites suggests that radioactive isotopes such as aluminium with a half-life of × (
The only benefit to Mars, from an exploitation standpoint, is colonizing. Then you have people there, and that creates the beginning of economic need, and it grows from there. What do you think about that argument?
It would be easier to create devices all over the world that pull carbon dioxide out of the atmosphere and put it into dry ice bricks that we store in some airtight chamber [to undo global warming] than colonizing Mars.
It would be cheaper, too. What is easier, developing a system to deflect large asteroids or colonizing Mars? The last time we had an extinction-level event on Earth was 65 million years ago. Within a thousand years, I believe space travel will become trivial enough that we will have already expanded to Mars.
Within a billion years, I suspect we will have been able to develop enough technology to deal with the brightening Sun.
A meeting of minds and miners: In the first episode of season 2 of Mars, the scientists prepare to share the planet with a new commercial prospecting crew. I like ion technology. It all comes down to energy storage. If you can store a lot of energy in small space, you can eventually get ion engines that are acceleration particles so fast that they gain relativistic mass. Pretty much everything ends with energy storage. A big chunk of uranium is a really really good dense energy storage if you have a nuclear reactor.
The Curiosity rover is powered by an RTG, nobody cared about that. The main concern is the safety of transporting it. People want to know, what if something goes wrong with that launch? If you want to have a nuclear powered spacecraft—a full-on nuclear reactor with a stockpile—you start by putting all of the hardware in space without the nuclear fuel.
Radioactive Dating Game Lab
Then you have a separate launch that is just the nuclear fuel, and it is guarded all to hell, so much that if the entire rocket disintegrates, the fuel will fall to Earth and still not breach. But this thing could literally blow up at any point during launch and the payload would fall from space to Earth and still it would not break open.
Oh, I love it. I want to be clear: The way I write is just my style of writing. I love soft sci-fi. The Enterprise can go Warp 9.
But then it should not take you very long to go from Mercury to Earth. After four years, the case was decided against Apple, as were later appeals. System 7 was the first Macintosh operating system to support bit addressing.
Finally, there was a component shortage that rocked the exponentially-expanding PC industry inforcing Apple USA head Allan Loren to cut prices, which dropped Apple's margins. In response, Apple introduced a range of relatively inexpensive Macs in October The Macintosh Classicessentially a less expensive version of the Macintosh SE, was the least expensive Mac offered until early Although due to considerable design issues, it was soon replaced in with the first of the PowerBook line: Also during this time, the Macintosh began to shed the "Snow White" design languagealong with the expensive consulting fees they were paying to Frogdesign.
Apple instead brought the design work in-house by establishing the Apple Industrial Design Groupbecoming responsible for crafting a new look for all Apple products.
In lateas the higher-end Macintosh desktop lineup transitioned to the ', Apple was unable to offer the ' in their top-of-the-line PowerBooks until early with the PowerBook seriesseveral years after the first powered IBM compatible laptops hit the market which cost Apple considerable sales. InIntel rolled out the Pentium processors as the successor to thewhile the Motorola was never released, leaving the Macintosh platform a generation behind IBM compatibles in the latest CPU technology.
A successful price war initiated by Compaq vaulted them from third place to first among PC manufacturers inovertaking a struggling IBM and relegating Apple to third place. At one point, its product lineup was subdivided into Classic, LC, II, Quadra, Performaand Centris models, with essentially the same computer being sold under a number of different names.
This succeeded in increasing the Macintosh's market share somewhat, and provided cheaper hardware for consumers, but hurt Apple financially as existing Apple customers began to buy cheaper clones which cannibalized the sales of Apple's higher-margin Macintosh systems, while Apple continued to bear the burden of developing Mac OS. Apple's market share further struggled due to the release of the Windows 95 operating system, which unified Microsoft's formerly separate MS-DOS and Windows products.
Windows 95 significantly enhanced the multimedia capability and performance of IBM PC compatible computers, and brought the capabilities of Windows substantially nearer to parity with Mac OS. This maneuver effectively ended the clone lines, as Apple had only licensed System 7 to clone manufacturers, not Mac OS 8. In September Apple extended Umax' license allowing them to sell clones with Mac OS 8, the only clone maker to do so, but with the restriction that they only sell low-end systems.
Revival[ edit ] The iMac G3introduced in While it led Apple's return to profitability, its associated mouse was one of consumers' least favorite products. Its translucent plastic case, originally Bondi blue and later various additional colors, is considered an industrial design landmark of the late s. The iMac proved to be phenomenally successful, withunits sold in days.
Apple completed elimination of the Macintosh product name inwhen "Power Macintosh" was retired with the introduction of the Power Mac G4. Apple continued to launch products, such as the unsuccessful Power Mac G4 Cube the education-oriented eMacand the titanium and later aluminium PowerBook G4 laptop for professionals.
Abiogenesis - Wikipedia
The original iMac used a PowerPC G3 processor, but G4 and G5 chips were soon added, both accompanied by complete case redesigns that dropped the array of colors in favor of white plastic. As ofall iMacs use aluminium cases. The structure of the microbes was noted to be similar to bacteria found near hydrothermal vents in the modern era, and provided support for the hypothesis that abiogenesis began near hydrothermal vents.
This would likely have repeatedly sterilized the planet, had life appeared before that time. Studies of meteorites suggests that radioactive isotopes such as aluminium with a half-life of 7. The time periods between such devastating environmental events give time windows for the possible origin of life in the early environments.
If the deep marine hydrothermal setting was the site for the origin of life, then abiogenesis could have happened as early as 4.
If the site was at the surface of the Earth, abiogenesis could only have occurred between 3. Its cofactors reveal dependence upon transition metalsflavinsS-adenosyl methioninecoenzyme Aferredoxinmolybdopterincorrins and selenium.