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23 Nov 2019
On July 4, 2005, the NASA spacecraft Deep Impact fired aprojectile onto the surface of Comet Tempel 1. This comet is about9.0 km across. Observations of surface debris released by theimpact showed that dust with a speed as low as 1.0 m/s was able toescape the comet.
1. Assuming a spherical shape, what is the mass of this comet? (The escape speed for an object at the surface of Earth is 11.2km/s).
Express your answer using two significant figures.
M = kg
2. How far from the comet's center will this debris be when it haslost 60% of its initial kinetic energy at the surface?
Express your answer using two significant figures.
r = km
On July 4, 2005, the NASA spacecraft Deep Impact fired aprojectile onto the surface of Comet Tempel 1. This comet is about9.0 km across. Observations of surface debris released by theimpact showed that dust with a speed as low as 1.0 m/s was able toescape the comet.
1. Assuming a spherical shape, what is the mass of this comet? (The escape speed for an object at the surface of Earth is 11.2km/s).
Express your answer using two significant figures.
M = kg
2. How far from the comet's center will this debris be when it haslost 60% of its initial kinetic energy at the surface?
Express your answer using two significant figures.
r = km
Tod ThielLv2
25 Oct 2019
