China Gold Supplier for PACKED SQUARE PIPE WITH OIL PAINTING PVC WRAP for Slovakia Factories

China Gold Supplier for PACKED SQUARE PIPE WITH OIL PAINTING PVC WRAP for Slovakia Factories

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High quality Very first,and Shopper Supreme is our guideline to offer the most beneficial company to our clients.Nowadays, we're hoping our best to be certainly one of the top exporters in our area to satisfy consumers additional will need for Hollow Pipe , Structure Pipe , Seamless Tube , We have exported to more than 40 countries and regions, which have gained good reputation from our costumers all over the world.
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We rely upon strategic thinking, constant modernisation in all segments, technological advances and of course upon our employees that directly participate inside our success for China Gold Supplier for PACKED SQUARE PIPE WITH OIL PAINTING PVC WRAP for Slovakia Factories, The product will supply to all over the world, such as: kazakhstan, Qatar, Manila, In the new century, we promote our enterprise spirit "United, diligent, high efficiency, innovation", and stick to our policy"basing on quality, be enterprising, striking for first class brand". We would take this golden opportunity to create bright future.


  • The Moon is our constant companion, shining away in the night. But how close could the Moon get before it’s not a Moon any more? Before it’s torn apart by the Earth’s gravity and becomes a terrifying ring of orbital debris?

    Is Phobos Doomed? Find out here: http://www.youtube.com/watch?v=BJHRyjkmxss

    Support us at: http://www.patreon.com/universetoday
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    Team: Fraser Cain – @fcain
    Jason Harmer – @jasoncharmer
    Chad Weber – weber.chad@gmail.com

    Created by: Fraser Cain and Jason Harmer
    Edited by: Chad Weber
    Music: Left Spine Down – “X-Ray”

    The Moon is great and all, but I wish it was closer. Close enough that I could see all kinds of detail on its surface without a telescope or a pair of binoculars. Close enough that I could just reach up and grab enough cheese for a lifetime of grilled cheese sandwiches.

    Sure, there would be all kinds of horrible problems with having the Moon that much closer. Intense tides, a total lack of good dark nights for stargazing, and something else…

    Oh right, the total destruction of life on Earth. On second thought the Moon can stay right where it is, thank you very much.

    The Earth’s Moon is located an average distance of 384,400 kilometers away. I say average because the Moon actually follows an elliptical orbit. At its closest point, it’s only 362,600 km, and at its furthest point, it’s 405,400 kilometers.

    Still, that’s so far that it takes light a little over a second to reach the Moon, traveling almost 300,000 km/s. The Moon is far.

    But what if the Moon was much closer? How close could it get and still be the Moon?

    Once again, I need to remind you that this is purely theoretical. The Moon isn’t getting closer to us, in fact, it’s getting further. The Moon is slowly drifting away from us at a distance of almost 4 centimeters per year.

    Let’s go back to the beginning, when the young Earth collided with a Mars-sized planet billions of years ago. This catastrophic encounter completely resurfaced planet Earth, and kicked up a massive amount of debris into orbit. Well, a Moon’s worth of debris, which collected together by mutual gravity into the roughly spherical Moon we recognize today.

    Shortly after its formation, the Moon was much closer, and the Earth was spinning more rapidly. A day on Earth was only 6 hours long, and the Moon took just 17 days to orbit the Earth.

    The Earth’s gravity stopped the Moon’s relative rotation, and the Moon’s gravity has been slowing the Earth’s rotation. To maintain the overall angular momentum of the system, the Moon has been drifting away to compensate.

    This conservation of momentum is very important because it works both ways. As long as a moon takes longer than a day to orbit its planet, you’re going to see this same effect. The planet’s rotation slows, and the moon drifts further to compensate.

    But if you have a scenario where the moon orbits faster than the planet rotates, you have the exact opposite situation.

    The moon makes the planet rotate more quickly, and it drifts closer to compensate. This can’t end well.

    Once you get close enough, gravity becomes a harsh mistress.

    There’s a point in all gravitational interactions called the Roche Limit. This is the point at which an object held together by gravity (like the Moon), gets close enough to another celestial body that it gets torn apart.

    The exact point depends on the mass, size and density of the two objects. For example, the Roche Limit between the Earth and the Moon is about 9,500 kilometers, assuming the Moon is a solid ball. In other words, if the Moon gets within 9,500 kilometers or so, of the Earth, the gravity of the Earth overwhelms the gravity holding the Moon together.

    The Moon would be torn apart, and turned into a ring. And then the pieces of the ring would continue to orbit the Earth until they all came crashing down. When that happened, it would be a series of very bad days for anyone living on Earth.

    If an average comet got within about 18,000 km of Earth, it would get torn to pieces. While the Sun can, and does, tear apart comets from about 1.3 million km away.

    This sounds purely theoretical, but this is actually going to happen over at Mars. Its largest moon Phobos orbits more quickly than a Martian day, which means that it’s drifting closer and closer to the planet.

    In a few million years, it’ll cross the Roche Limit, tear into a ring, and then all the pieces of the former Phobos will crash down onto Mars. We did a whole episode on this, and we’ll link it up here and in the description.



    This is a sample video from TheMetalSchool.com that shows how to properly weld a tubing joint that has a poor fit using a TIG welder.

    Cooperate with you every time is very successful, very happy. Hope that we can have more cooperation!
    5 Stars By Sharon from Slovenia - 2016.02.28 14:19
    The customer service staff is very patient and has a positive and progressive attitude to our interest, so that we can have a comprehensive understanding of the product and finally we reached an agreement, thanks!
    5 Stars By Elizabeth from Bolivia - 2016.02.14 13:19

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