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Primary 4 | Maths
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Please help, is science thanks!
Date Posted: 4 years ago
Views: 277
learning pt:
1. most matter expand when heated, contract when cooled [ 热胀冷缩 ]
so
2. the metal tracks expand on a hot day.
why do u think happens to the gap between the metal tracks?
...
1. most matter expand when heated, contract when cooled [ 热胀冷缩 ]
so
2. the metal tracks expand on a hot day.
why do u think happens to the gap between the metal tracks?
...
See 1 Answer
The distance of the gaps become smaller or decreases.
During a hot day, the railway track gain heat from the surrounding air or Sun, expanded and became longer. The track is then nearer to another track, causing the between the track to be smaller.
During a hot day, the railway track gain heat from the surrounding air or Sun, expanded and became longer. The track is then nearer to another track, causing the between the track to be smaller.
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