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5 Jan 2019
13.60 ... Mass of a Comet. On July 4, 2005, the NASA space- craft Deep Impact fired a projectile onto the surface of Comet Tempel 1. This comet is about 9.0 km across. Observations of sur- face debris released by the impact showed that dust with a speed as low as 1.0 m/s was able to escape the comet. (a) Assuming a spherical shape, what is the mass of this comet? (Hint: See Example 13.5 in Section 13.3.) (b) How far from the comet's center will this debris be when it has lost (1) 90.0% of its initial kinetic energy at the surface and (ii) all of its kinetic energy at the surface?
13.60 ... Mass of a Comet. On July 4, 2005, the NASA space- craft Deep Impact fired a projectile onto the surface of Comet Tempel 1. This comet is about 9.0 km across. Observations of sur- face debris released by the impact showed that dust with a speed as low as 1.0 m/s was able to escape the comet. (a) Assuming a spherical shape, what is the mass of this comet? (Hint: See Example 13.5 in Section 13.3.) (b) How far from the comet's center will this debris be when it has lost (1) 90.0% of its initial kinetic energy at the surface and (ii) all of its kinetic energy at the surface?
Patrina SchowalterLv2
5 Jan 2019
