Tungsten Bar and Satellite

In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural secondary planets such as moon. The world's first artificial secondary planet, the Sputnik 1, was launched by the Soviet Union in 1957. In the whole solar system, except for Mercury and Venus, the other planets are all natural objects. Wolfram is a rare non-ferrous metal in the world, and its annual output is very low. In addition, it is very versatile and mainly applied in the casting material. Nowadays, the total number of natural objects is at least 160. For example, in the solar system, the sun is a fixed star, and the earth and other planets orbit around the sun, and the moon and other planets orbit around the earth, these planets are called natural secondary planet.

Not long ago, there has been a weapon called satellite powered gun, which is also known as "God's scepter." This is an extraterrestrial combat device which is still being researching and developing. Theoretically, this weapon can shoot to the ground with tungsten bar through its track, and it can cover any range of the entire planet. Tungsten metal is lustrous and silvery white in color, and does not occur naturally (it has an abundance of 1 ppm in the earth's crust). Attack that originates from space, not only has the capability to destroy large tracts of ground buildings, but also destroys hundreds of meters deep underground bunkers. Powered gun can hit the ground by gravity, and it can be accelerated to the speed of 3403 m / sec which is the same as the destruction of nuclear weapons, but it would not cause catastrophic nuclear radiation.

In the movie "GI Joe 2", it is mentioned that the "silos" can be considered as a geostationary secondary planet, tungsten bar will do elliptical motion around the earth with "silos" in the absence of thrust. However, according to the law of conservation of energy, kinetic energy of landing of this type of tungsten products does not exceed its own potential energy of the near-Earth orbit, and its potential energy in the near-Earth orbit cannot exceed kinetic energy of its rocket launching. So, in fact floor  kinetic energy of tungsten bar is probably less than a quarter of the rocket fuel energy, and therefore, such weapons are currently still in the theoretical condition.

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