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T1 CH1 Measurements — Science STD 7 — Question

Tamilnadu BoardEnglish MediumSTD 7ScienceT1 CH1 Measurements2 Marks
Question
Define astronomical unit.
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Answer

One astronomical unit is defined as the average distance between the earth and the sun. 1AU
$=1.496 \times 10^{11} m$ or $149.6 \times 10^6 m$

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