Abstract
Total energy = (10−16 W) × (40 telescopes) × (38 yr × 3.14 × 107 s/yr) = 4.8 × 10−6. J = 48 erg. The energy gained by 1 g in falling 2 cm is E = mgh or E = (1 g) (980 cm s−2) (2 cm) = 1960 erg. So the radio telescopes have received less energy than gained by an ash falling 2 cm in the earth’s gravity.
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© 2000 Springer-Verlag Berlin Heidelberg
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Wilson, T.L., Hüttemeister, S. (2000). Solutions for Chapter 5. In: Tools of Radio Astronomy. Astronomy and Astrophysics Library. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-57001-8_19
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DOI: https://doi.org/10.1007/978-3-642-57001-8_19
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