# What was the relationship between Tycho and Kepler? Tycho worked for Kepler Kepler worked for Tycho

Question 1 What was the relationship between Tycho and Kepler? Tycho worked for Kepler Kepler worked for Tycho Tycho and Kepler were competitors They made the same discoveries independently Question 2 What is the semimajor axis (in AU) of a planet with an orbital period of 75 years? Question 3 What 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 4 The statement: “A planet’s orbital period squared is equal to its semimajor axis cubed.” is also known as … Kepler’s Second Law Newton’s Law of Gravity Kepler’s First Law Kepler’s Third Law Question 5 The idea that planets do not move at constant speeds in their orbits can be attributed to… Copernicus Tycho Kepler Galileo Question 6 What is the force of gravity (in Newtons) acting between the Earth and a 125-kg person standing on the surface of the Earth? Question 7 What 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 8 What 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 9 What 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 10 The first proof that the Earth orbits the Sun was provided by… Galileo’s observation of the phases of Venus Kepler’s Laws Newton’s Law of Universal Gravity Tycho’s observations of the motion of Mars Question 11 Which of the following did Galileo not observe with his telescope? mountains on the Moon the planet Neptune sun spots the moons around Jupiter Question 12 The statement: “Planets move in ellipses with the Sun at one focus.” is also known as … Kepler’s Third Law Newton’s Law of Gravity Kepler’s Second Law Kepler’s First Law Question 13 When Kepler began his work, which solar system model was able to make the most accurate predictions? Ptolemy’s model Tycho’s model Copernicus’ model All the models were more or less equivalent Question 14 The statement: “An object in motion will continue in motion unless acted on by an outside force.” is also known as… Kepler’s First Law Kepler’s Third Law Kepler’s Second Law Newton’s First Law Question 15 What key event allowed Kepler to develop his own model for solar system motion? Galileo’s invention of the telescope The 30-Years War The Papal Inquisition The untimely death of Tycho