Match the astronomer to their contribution to ancient Greek astronomy: Developed the long-standing geocentric model of the universe until it was replaced during the Renaissance A. Aristarchus One of the first to claim that the Earth may orbit the Sun, but his ideas were rejected by later philosophers B. Aristotle Developed a technique for measuring the circumference of the Earth long before anyone circumnavigated the globe with ships C. Eratosthenes D. Pythagoras Used eclipses to confirm the shape of the Earth and that the Moon was closer to the Earth than the Sun despite the fact that they appear to be the same size in the sky E. Ptolemy Brilliant geometric mind that was one of the first to propose that all of the heavenly bodies were spheres due to their F. Hipparchus perfect natures Established the apparent magnitude system that we use to measure the brightness of stars and deduced that the direction of Earth's axis of rotation has changed over time

According to Lunar Laser Ranging experiments the average distance LM from the Earth to the Moon is approximately 3.85 × 10° km. The Moon orbits the Earth and completes one revolution in approximately 27.5 days (a sidereal month). How can the mass of the Earth be calculated using the information above? Select the correct statements. Select one or more: O a. Use Newton's third law. O b. Use Newton's first law. c. Use Coulombs law. O d. Use Newton's second law.

Which of the following was NOT done by Galileo Galilei? A. discovering four large moons around Jupiter B. turning the telescope to the sky and believing what it showed his eyes C. explaining retrograde motion with the heliocentric hypothesis D. resolving the Milky Way into many, many stars E. discovering that Venus goes through phases (like the Moon)

Number 75

One astronomical unit (AU) is defined as the average distance between Earth and the Sun, approximately 149,500,000 kilometers (km). What is the distance in AU between the Sun and Mercury, which is 58,000,000km from the Sun?  a.2.58 b.0.4 c.388.0 d.3.9

Review Homework The assignment does not need to be submitted " you are encountering difficulties with this homework reach out to the instructor, the student instructor, or a tutor. The instructor's office hours are MWF 1:30-2:30 pm and M 7-8 pm, F 8-9pm. À Race Car A 1200kg race car is initially at rest. When the driver steps on the gas, the car's engine to pushes it forward with a constant force of 6200N. a 420ON 1. What is the acceleration of the car? 1200kg 2. How far will the car go in 3.0s? 2 Reading a ruler The picture below shows a tape measure measuring a board. How long is the board? Be sure to provide a ± accuracy with your number. 51 in 52 53 54 5! 53.25in=.01in 3 Water bottle full of sand Sand has a density of 1621 . 1. What is the mass of a one liter water bottle full of sand? 2. What is the weight of the water bottle? 1

12. Which of the following lists of people contains three people who each supported a heliocentric model of the Universe?   a. Copernicus, Kepler, Galileo.   b. Ptolemy, Tycho, Kepler.   c. Aristarchus, Plato, Ptolemy.   d. Aristotle, Ptolemy, Plato.