52. A small gap is left at joints o...
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52. A small gap is left at joints of rails in a railway track to (1) avoid the tracks being distorted due to seasonal temperature variation (2) avoid the heating of tracks to high temperature (3) control the speed of train (4) keep the rails equidistant

11th - 12th Class
Physics
Solution
92
Rating
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(1) During semmer (lot femperaturs), flu molecules begin to expand and thus the sail tratit trask expands
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