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| 1. |
\tDo A.U. and å stand for the same unit? Explain. |
| Answer» \tAstronomical Unit(a.u): A unit of measurement equal to 149.6 million kilometres, the mean distance from the centre of the earth to the centre of the sun.\tAngstrom Å ; A unit of length equal to one hundred-millionth of a centimetre, 10−10 metre, used mainly to express wavelengths and interatomic distances. | |