Quiz 3

Question 1What was the relationship between Tycho and Kepler?Tycho worked for KeplerKepler worked for TychoTycho and Kepler were competitorsThey made the same discoveries independentlyQuestion 2What is the semimajor axis (in AU) of a planet with an orbital period of 75 years?Question 3What was Galileo’s final punishment for his disagreement with the Catholic Church?He served 10 years in prison.He was fined the equivalent of 10 years wages.He was sentenced to death.He was placed under house arrest for life.Question 4The statement: “A planet’s orbital period squared is equal to its semimajor axis cubed.” is also known as …Kepler’s Second LawNewton’s Law of GravityKepler’s First LawKepler’s Third LawQuestion 5The idea that planets donotmove at constant speeds in their orbits can be attributed to…CopernicusTychoKeplerGalileoQuestion 6What is the force of gravity (in Newtons) acting between the Earth and a 125-kg person standing on the surface of the Earth?Question 7What is the force of gravity (in Newtons) acting between the Sun and a 4,500-kg rocket that is 0.75 AU from the Sun?Question 8What is the force of gravity (in Newtons) acting between the Earth and a 5-kg bowling ball that is resting on the surface of the Earth?Question 9What is the force of gravity (in Newtons) acting between the Earth and a 100-kg person who is on board the International Space Station, 350 km above the surface of the Earth?Question 10The first proof that the Earth orbits the Sun was provided by…Galileo’s observation of the phases of VenusKepler’s LawsNewton’s Law of Universal GravityTycho’s observations of the motion of MarsQuestion 11Which of the following did Galileonotobserve with his telescope?mountains on the Moonthe planet Neptunesun spotsthe moons around JupiterQuestion 12The statement: “Planets move in ellipses with the Sun at one focus.” is also known as …Kepler’s Third LawNewton’s Law of GravityKepler’s Second LawKepler’s First LawQuestion 13When Kepler began his work, which solar system model was able to make the most accurate predictions?Ptolemy’s modelTycho’s modelCopernicus’ modelAll the models were more or less equivalentQuestion 14The statement: “An object in motion will continue in motion unless acted on by an outside force.” is also known as…Kepler’s First LawKepler’s Third LawKepler’s Second LawNewton’s First LawQuestion 15What key event allowed Kepler to develop his own model for solar system motion?Galileo’s invention of the telescopeThe 30-Years WarThe Papal InquisitionThe untimely death of Tycho

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