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Our method of analysis detects clearcutting but it does not distinguish between old-growth and second- or third-growth forests. Tracking clearcuts--places where nearly the entire forest has been cut down--provides a rough gauge for how extensively ... more
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It all depends. A loudspeaker must move a lot of air in order to sound good. The larger the cabinet, the more air the speaker can move. But sound quality is also affected by the speaker's quality the cabinet's composition and construction, and the ... more
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You will need to add a motor to the dish and then program the receiver to add the new satellites. ... more
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The satellites orbit 740 kilometres above Earth. They travel at the speed of Earths rotation. ... more
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There are about 3,000 useful satellites and 6,000 pieces of junk orbiting earth right now. Satellites can be used for all sorts of purposes like scientific research, communications, military, weather, navigation, and earth observation. On dark ... more
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That's not clear, as the Pentagon may not release its best estimates of satellite orbits. But space analysts say the data the Pentagon does make publicly available is not precise enough to accurately estimate the probability that two objects might ... more
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Mercury does not have any satellites and neither does Venus. All of the other planets have at least one satellite. Jupiter has the most with 88. ... more
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I don't think the motional energy which causes gravity is travelling particularly fast. Matter decay is a very very slow process so the motional flow of energy would be more like a very gentle breeze. Significantly, in this case, the energy 'breeze' ... more
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Answer by Bill Straka The simple answer to the question of when will the GPS vehicles will return to a given position is "Never." The reason is to be found in the basics of celestial mechanics. If the satellites were point masses, and the Earth ... more
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The GPS Operational Constellation consists of 24 satellites: 21 navigational SVs and 3 spares orbit the earth in 12 hour orbits. ... more
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