Which of the following weapons helped continue the stalemate on battlefields during World War 1? the tank
the submarine
O the fighter plane
O the machine gun

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copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.