Space X successfully test-fires Merlin 1D engine, forgets to buy marshmallows

SpaceX has added another string to its now weighty bow by successfully test firing the Merlin 1D engine, which will propel future craft into the thermosphere. The 1D is the sequel to the Merlin engines used to convey the DragonX to the International Space Station, with an improved thrust-to-weight ratio that reportedly makes it the most efficient booster engine ever built. It's hoped that the gear will be ready to make the jump to full use in time for the sixth flight of the Falcon 9, currently pencilled in for 2013. If you're the sort who enjoys watching a big pile of fire being pushed into a concrete chamber, you're really gonna love the video after the break.

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Space X successfully test-fires Merlin 1D engine, forgets to buy marshmallows originally appeared on Engadget on Tue, 26 Jun 2012 09:09:00 EDT. Please see our terms for use of feeds.

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Oil hovers above $79 amid EU summit doubts

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Science of slinkys explained with slow-mo video

10 hrs.

John Roach

Dangle a slinky off the roof of a building until it is fully extended, then let go and notice something odd: The bottom will hover in mid-air long enough to make even the casual observer to go, ?huh?? Thankfully, scientists have taken it upon themselves to explain this strangeness.

And they?ve done it with the help of high-speed video so that we can watch the suspended, collapsing spring in super slow motion.

Mike Wheatland from Australia?s University of Sydney explains in the video below?that when you let go of the slinky at the top, ?there?s a finite time for that information (i.e. signal) about that change to get to the bottom of the slinky.??

Until the bottom of the slinky gets the message, it just hangs there oblivious to the change happening form above. Hence, the hovering effect.?

For a bit more technical explanation, check out the explanation at io9. You can also geek out to the physics of slinkys by reading this paper on arXiv by Bill Unruh, a physics professor at the University of British Columbia.

Of course, you can also stare at the slinky and let time slip away one collapsed coil at a time.

--via io9

John Roach is a contributing writer for msnbc.com. To learn more about him, check out his website and follow him on Twitter. For more of our Future of Technology series, watch the featured video below.

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At least 18 killed in Uganda landslides: Red Cross

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Hodgson at a loss after penalty jinx strikes again

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Obama offers mixed verdict on immigration ruling

WASHINGTON (AP) ? Pressing his immigration agenda, President Barack Obama said he is pleased the Supreme Court struck down key parts of Arizona's immigration law Monday but voiced concern about what the high court left intact.

The court allowed a provision requiring police to check the immigration status of someone they stop for another reason and who they suspect is in the country illegally.

Said Obama: "No American should ever live under a cloud of suspicion just because of what they look like." He said police in Arizona should not enforce the provision in a way that undermines civil rights.

The court's decision comes days after the Obama administration issued a directive that protects from deportation hundreds of thousands of younger immigrants who came illegally to the United States as children. Obama on Monday used the court's decision to push for congressional action on a broader overhaul of immigration laws and to reaffirm his move to target deportations to criminals.

"I will work with anyone in Congress who's willing to make progress on comprehensive immigration reform that addresses our economic needs and security needs, and upholds our tradition as a nation of laws and a nation of immigrants," he said in a statement before leaving on a two-day campaign and fundraising trip.

The decision keeps the issue of immigration as a high profile issue and gives Obama yet another opening to boost his standing with Hispanic voters for whom immigration is an important issue. Obama won two-thirds of the Latino vote in 2008 and has a large lead over rival Mitt Romney among that voting bloc in recent polls.

Obama pledged in 2008 to push for passage of comprehensive changes in immigration laws, but the effort stalled in Congress and Obama turned his attention to addressing the economy and pressed ahead with passing an overhaul of health care laws, which consumed much of 2010.

Romney on Monday blamed Obama for lack of action on immigration. He also said states have the right to secure their borders, "particularly when the federal government has failed to meet its responsibilities."

White House spokesman Jay Carney said Monday that efforts to deal with immigration have been hindered by "a retreat" among Republicans who had once advocated changes. He noted that Romney had embraced the Arizona law as a model for the country during the Republican primaries ? a position, Carney said, "that hardly suggests a desire for comprehensive bipartisan immigration reform."

The Supreme Court on Monday struck down other provisions of Arizona's crackdown on illegal immigrants, including requiring all immigrants to carry registration papers with them.

"A patchwork of state laws is not a solution to our broken immigration system ? it's part of the problem," Obama said.

That echoed what Obama said in April 2010 when Arizona passed its law. "If we continue to fail to act at a federal level, we will continue to see misguided efforts opening up around the country," Obama warned at the time.

Associated Press

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