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This video is about how skyscrapers stay up and what materials are used to create different kinds of skyscrapers.

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Mach

the ratio of the speed of a body to the speed of sound in the surrounding medium. It is often used with a numeral (as Mach 1, Mach 2, etc.) to indicate the speed of sound, twice the speed of sound, etc

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How to Find Constellations | Indiana DNR

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Brad Bumgardner, Interpretive Naturalist at Indiana Dunes State Park, demonstrates how to find a handful of constellations in the night sky including the Big Dipper, Little Dipper, Boötes, Cassiopeia, and Draco. To find a night sky program near you, visit http://www.interpretiveservices.in.gov

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Scale of distance to closest stars. The nearest stars to our solar system, are located in the Alpha Centauri system. The two main stars are Alpha Centauri A and Alpha Centauri B, which are approximately 4.3 light years away from Earth.

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The Soyuz rocket that will launch Tim into space is 45 m high, this something as tall as a 15 storey building. But the largest rocket ever flying to space, the Saturn V, was much bigger than that. It was 110 m hight, as tall as a 36 storey building!

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Rocket Propulsion. Rockets (and jet engines) work much like a balloon filled with air. ... This results in a net force acting forward on the balloon—thrust. The balloon flies forward under the influence of the thrust, and the air coming out of the back of the balloon is the equal and opposite reaction to the thrust.

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A rocket (from Italian rocchetto "bobbin") [nb 1] is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine. Rocket engine exhaust is formed entirely from propellant carried within the rocket before use. ... In fact,rockets work more efficiently in space than in an atmosphere.

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With this simple preamble, the Congress and the President of the United Statescreated the National Aeronautics and Space Administration (NASA) on October 1, 1958. NASA's birth was directly related to the pressures of national defense

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“An average bolt of negative lightning carries an electric current of 30,000 amperes (30 kA), and transfers 15 coulombs of electric charge and 500 megajoules of energy. Large bolts of lightning can carry up to 120 kA and 350 coulombs.

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Blue Sky Science: Why is light faster than sound?

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Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges.

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Balancing chemical equations | Chemical reactions and stoichiometry | Chemistry | Khan Academy

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measure the rate of oxygen gas production

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measure the rate of oxygen gas production

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the image:Columbia lifts off for the first time from Kennedy Space Center on April 12, 1981. Credit: NASA
On Feb. 1, 2003, space shuttle Columbia broke up as it returned to Earth, killing the seven astronauts on board. NASA suspended space shuttle flights for more than two years as it investigated the disaster.

An investigation board determined that a large piece of foam fell from the shuttle's external tank and fatally breached the spacecraft wing. This problem with foam had been known for years, and NASA came under intense scrutiny in Congress and in the media for allowing the situation to continue.

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Ireland Vs. Chile

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The Room

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Make Colorful Fire Flames ~ Incredible Science

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Making Coloured Fire and Home Made Fireworks!

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Make different coloured flames with various compounds Facebook- http://www.facebook.com/mist8kspage Twitter- https://twitter.com/Mist8kofficial This video I use- Copper sulphate, Sodium chloride, Strontium nitrate, and Potassium chlorate. For the D.I.Y firework I used. Strontium nitrate + Potassium chlorate + sugar Some of the chemicals used in this science experiment can be are very dangerous.

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Science behind fireworks

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They're the biggest- and loudest- part of America's Independence Day celebrations: Fireworks! Anthony shows us how where they came from and what makes 'em go "BOOM!"

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MegaLab - Flame Test - Li, Na, K, Ca, Sr, Ba, Cu