When are intermolecular forces the strongest?

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Define Mass?

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Explain the refraction of light ?

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If a body is hung from a spring balance first at the poles and then at the Equator, why do the readings of the balance change ?

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Does an aeroplane overtaking other aeroplane pass through its right or left ?

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Why are the tides produced in the sea ?

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How long does the light from sun take to reach us?

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Explain the Hygrometers ?

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When the letters of an opposite side board are found in a mirror as reverse,why the same is not shown as up and down?

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What is anti - noise?

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What is the Spectrum?

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Explain the balanced field takeoff?

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