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Example 20 3 A steel ruler exactly 20 cm long is graduated to give correct...

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Example 20 3 A steel ruler exactly 20 cm long is graduated to give correct measurements at 20 C a Will it give readings that are too long or too short at lower temperatures b What will be the actual length of the ruler when it is used in the desert at a temperature of 40 C a steel 1 2 x 10 5 C Solution a IS

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