Physics1Ahw10

# Physics1Ahw10 - 11 m from the center of the sun what is its...

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Physics 1A Winter 2008 Problem Set # 10 1) In 2004 astronomers reported the discovery of a large Jupiter-sized planet orbiting very close to the star HD 179949 (hence the term "hot Jupiter"). The orbit was just 1/9 the distance of Mercury from our sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). What is the mass of the star? Express your answer (a)in kilograms and (b)as a multiple of our sun's mass. How fast (in km/s) is this planet moving? 2) The International Space Station makes 15.65 revolutions per day in its orbit around the earth. Assuming a circular orbit, how high is this satellite above the surface of the earth? 3) Comets travel around the sun in elliptical orbits with large eccentricities. If a comet has speed 1.6×10 4 m/s when at a distance of 2.6×10
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Unformatted text preview: 11 m from the center of the sun, what is its speed when at a distance of 5.8×10 10 m. 4) Calculate the percent difference between your weight in Sacramento, near sea level, and at the top of Mount Everest, which is 8800 m above sea level. 5) On July 4, 2005, the NASA spacecraft Deep Impact fired a projectile onto the surface of Comet Tempel 1. This comet is about 9.0 km across. Observations of surface debris released by the impact showed that dust with a speed as low as 1.0 m/s was able to escape the comet. Assuming a spherical shape, what is the mass of this comet? (The escape speed for an object at the surface of Earth is 11.2 km/s). How far from the comet's center will this debris be when it has lost 90 % of its initial kinetic energy at the surface?...
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