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Expansion and contraction
Lower Sec Science · Secondary 2 · Medium · Expansion and contraction
A metal railway track is fixed tightly to concrete sleepers on a cool morning. By noon, the temperature of the track increases by . What is a possible effect of this heating on the track?
- The track contracts and becomes shorter.
- The track expands and may buckle if there is no gap.
- The track remains exactly the same length.
- The track melts completely into a liquid.
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