It is an obelisk. The first obelisks were built by ancient Egyptians, at the entrance of their temples. They probably symbolized Ra, the god of the sun. At roughly the same time, Assyrians built them as well, to celebrate the achievements of their kings. Then, the ancient Greeks adopted this type of building, and after them the Romans, as well as the Turks in the Middle Ages.
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Apply a coat of resin or varnish.
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<h3>Newton's 2nd law states acceleration is proportional to the net force acting on an object. The net force is the vector sum of all the forces applied to the object. ... In this case the acceleration (slowing down) of the puck is proportional to the amount of friction.</h3>