Consider a spherical asteroid with a density ρ = 3 g/cm3 and a radius R = 100 km. If its surface is covered with a thin layer of (loosely bound) regolith, what is the shortest rotation period it can have without losing the regolith at it

Consider a spherical asteroid with a density ρ = 3 g/cm3 and a radius R = 100 km. If its surface is covered with a thin layer of (loosely bound) regolith, what is the shortest rotation period it can have without losing the regolith at it

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter11: Angular Momentum

Section: Chapter Questions

Problem 74P: Neptune has a mass of 1.01026kg and is 4.5109km from the Sun with an orbital period of 165 years....

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Question

Consider a spherical asteroid with a density ρ = 3 g/cm3 and a radius
R = 100 km. If its surface is covered with a thin layer of (loosely bound) regolith, what is
the shortest rotation period it can have without losing the regolith at its equator?

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Neptune has a mass of 1.0 ✕ 1026 kg and is 4.5 ✕ 109 km from the Sun with an orbital period of 165 years. Planetesimals in the outer primordial solar system 4.5 billion years ago coalesced into Neptune over hundreds of millions of years. If the primordial disk that evolved into our present day solar system had a radius of 1011 km, and if the matter that made up these planetesimals that later became Neptune was spread out evenly on the edges of it, what was the orbital period (in years) of the outer edges of the primordial disk? yr