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Advice Home Business Technology Online Advertising Motivational Internet Marketing SEO Help Online Games Science Articles Happiness More Articles:1. Theory behind Ultrasonic Flow Meters Summary:End users and flow metering specialists all over the world utilise non-invasive techniques to establish flowrates utilising clamp on flow meters or ultrasonic flow meters. It is widely accepted that transit-time flow measurement devices are more accurate than clamp on doppler equivalents. Unlike the doppler flow meter which requires entrained particles or solids, transit time flow meters cannot measure velocities accurately as particles interfere with the ultrasonic path. A third config… 2. Satellite Orbits Summary: The following orbits can be defined: Low Earth Orbit Satellites in low earth orbit (LEO) orbit the earth at altitudes of less than 2000 km (1242 miles). MEO's are used generally for navigational satellites and communications satellites Geostationary Orbit. A satellite in geostationary orbit orbits the earth in exactly 1 day and is placed above the equator. These satellites are used for communications and Satellite TV. Polar Orbit An orbit that goes over both the North and the South Pole… 3. Mars Global Surveyor Summary: In May of this year, the Surveyor again made history by being the first spacecraft to ever take images of other spacecraft in orbit, taking images of the European Space Agency's Mars Express and NASA's Mars Odyssey. Nasa - National Mars Exploration Program - http://www.nasa.gov/home/: : 1) One Mars Orbiter Takes First Photos of Other Orbiters 2) Mars Orbiter Sees Rover Tracks Among Thousands of New Images 3) Nasa Press Releases September 20, 2005 4) Recent Changes on Mars Seen by Mars… 4. Time travel: sci-fi? Summary: One light year is the distance travelled by light (in vacuum) during one year. Therefore one light year equals (300 000 000*3600*24*365)m.A single light year is definitely huge: 9.46 trillion kilometres-no need to put this in digit form-in fact. A star that you see in the night sky is not one but many light years away. Article:When you look at the keen night sky, you see stars-those tiny diamonds suspended in the vast pitch-black emptiness. But stars shine because…? Our own sun, which i… |
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