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Please I need answers on thermal physics and relativity? Challenging competition-level math problem! One of my mathletes and I are stumped with the following problem. Any clue is much appreciated.? Could turtles run fast if they really wanted to? The circumference of a circle is x square units and the area of the circle is y square units.if x=y, then radius of the circle is :? What is the constant density value of plasma?...?