23 Energy and Eccentricity

23 Energy and Eccentricity - Its existence was predicted...

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THE MECHANICAL UNIVERSE Name: Mai Nguyen Video 23. Energy and Eccentricity Class: PHYS 2425 1P1 1. What three mathematical curves (or conic sections) do all heavenly bodies follow? Ellipse, parabola, hyperbola. 2. The rewards of science pay off in what currency? Mathematics. 3. A planet’s potential energy is lowest at what point around the sun? When it is closest to the sun. 4. How is the energy of a planet similar to that of a swinging pendulum? The potential energy and kinetic energy of the planet keep trading back and forth. One goes up and the other goes down. 5. How was Pluto discovered? It stands out clearly in photographs, moving among the fixed stars.
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Unformatted text preview: Its existence was predicted before it was actually discovered because of the effect it has on the orbits of Neptune and Uranus. 6. For how many stars had Tycho Brahe made observations? 777 stars, all that the naked eye could see. 7. On what does the shape of a planet’s orbit depends on? The energies of the planet (the kinetic energy and potential energy) affect the orbit. The eccentricity determines the orbit. 8. A hyperbolic orbit has what eccentricity? Greater than 1. 9. Who was the first person to know what Newton had done? His young friend Edmond Halley....
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This note was uploaded on 07/04/2011 for the course PHYS 2425 taught by Professor Sherman during the Spring '08 term at Collin College.

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23 Energy and Eccentricity - Its existence was predicted...

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