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All seven astronauts on the space shuttle Columbia died.

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It is a fitness tracking application that enables you to use the built-in GPS of your mobile device to track all of your fitness activities. Record your workout details, including duration, distance, pace, speed, elevation, calories burned, and route traveled on an interactive map.

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A step by step guide on how to use Map my Run App as you prepare for the Kilimanjaro Marathon 2016. Download on Android: https://play.google.com/store/apps/details?id=com.mapmyrun.android2&hl=en Download on Iphone: https://itunes.apple.com/us/app/map-my-run-gps-running-workout/id291890420?mt=8

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Black Holes Explained – From Birth to Death

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A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

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Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22

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Covalent bonds are chemical bonds between two non-metal atoms. Atoms share each other's electrons to create a full outer shell between them.

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Chemical bonds are what joins atoms together. When two or more atoms are in a chemical bond they stay together unless the needed amount of energy, or more, is transferred to the bond. Something different can then happen.

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An ionic bond is the bonding between a non-metal and a metal, that occurs when charged atoms (ions) attract. This happens after a metal atom loses one or more of its electrons to the nonmetal atom. This makes the bond stronger and harder to break.

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It’s because the forces on re-entry far exceed those during a launch, enough to tear an unprotected spacecraft apart. Rockets are built to withstand the atmospheric forces as they leave the atmosphere, but it’s nothing on the scale of re-entry.

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Inside the nucleus is protons and neutons. Protons are positive and neutrons are neutral. Electrons orbit the nucleus on their shells.

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Space Shuttle Columbia Launch Cockpit View

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If you want to make some money with your videos on youtube join Freedom Network here: http://www.freedom.tm/via/argoncolossus Download PC Games here: http://www.freemmorpgtoplay.com/ Nasa Space Shuttle Endeavour Launch (STS-99) Download PC Games here: http://www.freemmorpgtoplay.com/

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NASA Space Shuttle's Final Voyage of Atlantis - Space Shuttle Launch 2011 (1080p HD)

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This NASA space video explains the Space Shuttle Atlantis's final mission into orbit. Constructed by the Rockwell International company in Southern California and delivered to the Kennedy Space Center in Eastern Florida in April 1985, Atlantis is the fourth operational and the second-to-last Space Shuttle built.

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NASA Kennedy Space Center Launch Complex 39A

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Cockpit + Crew Audio ♦ Launch , Re-entry & Landing

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Space Shuttle First Flight (STS-1): "A Remarkable Flying Machine" 1981 NASA

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more at http://scitech.quickfound.net/astro/space_shuttle_news.html "This film documents the first historic flight of a space shuttle, the U.S. spacecraft Columbia, which launched on April 12, 1981. The footage highlights liftoff, the onboard activities of astronauts John Young and Robert Crippen, as well as the landing in Rogers Dry Lake bed in California."

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Spacevidcast (now TMRO -- see new channel)

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STS-133 The Final Launch of Space Shuttle Discovery including T-5 hold

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This video includes clips starting at L-28 minutes showing the computer problems, additional T-5 hold added to the count, Go/No-Go statuses and ascent information for OV-103 or Space Shuttle Discovery. Launch was on Feb 24th, 2011 and this is the last time Space Shuttle Discovery will ever fly.

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HCL+NaOH= NaCl=H2O

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University of Illinois Department of Psychology , Neuroscience Program

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Clownfish burst onto the public scene nearly a decade ago with Disney-PIXAR's now classic animated film "Finding Nemo." Perhaps unsurprisingly, the film left out a very important part of the clownfish story -- that clownfish can actually change their sex in response to their social environment.

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In fish that change gender only parts of the reproductive organs mature at first. The fish lives as a male or a female for awhile. when the fish reaches a certain age, or its mate dies those initial reproductive organs wither away and other reproductive organs mature, so that the fish becomes the opposite sex. This change is caused by hormones or chemical messengers in the blood.  A fish has both testicular and ovarian tissue and it is matter of just encouraging one of those tissues to develop. They use mostly vision and sound signals to communicate to hypothalamus in areas of the brain. This communicates with the pituitary gland which is a little gland right below the brain. This releases hormones into the blood and communicate to the gonads. This causes the testicles to absorb and ovaries to develop. This completely reverses the behavior so they change from a male to a female fish.

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The process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth.

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The bright dancing lights of the aurora are actually collisions between electrically charged particles from the sun that enter the earth's atmosphere. The lights are seen above the magnetic poles of the northern and southern hemispheres.

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When an acid and a base react salt and water are formed.

This is called a neutralisation reaction.

The average titration figure is then used to standardise the acid solution.

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Hydrogen Peroxide naturally breaks down to produce Oxygen and Water.

Manganese dioxide acts as a catalyst for this reaction to speed up the breakdown of the Hydrogen Peroxide.
•2H2O2 = 2H2O + O2

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How far you travel. What length of space you travel between two points.
It can be measured in kilometres, metres or centimetres.

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Is a measurement of how long it takes.
It can be in hours, minutes or seconds.

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The rate in which a body moves.
It can be measured in km/h or m/s etc.

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The increase in speed during a period of time.

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Velocity is acceleration in a given direction.

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Dad's Silly Triangle.

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It is the ratio of the speed of a body speed of sound.
Mach is 1234 km/