When constructing a railroad, two connecting rails need to be given a small separation, to allow for expansion during the summer months. If the beams are made of steel in a factory at 23oC at a length of 3 m, and they can be expected to heat up to temperatures of 50oC, what should the spacing between steel beams be? Consider the coefficient of linear thermal expansion of steel to be 12x10-6 K-1.
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