Chapter 2- QP

1. If people on Earth were viewing a total lunar eclipse, what would you see from your home on the Moon? Draw a diagram. 2. Why were the main reasons why the idea that the Earth was at the center of the universe lasted so long? 3. Discuss in 2 paragraphs the observations made by Galileo that disproved Geocentrism. Which one do you think was the most important? 4. Write down a hypothesis and observational experiment to test one of Newton’s laws of motion. EXPLAIN YOUR REASONING! 5. One of the first exoplanets discovered orbits the star 51 Pegasi with a period of just 4.2 days. 51 Pegasi is very similar to the Sun. Use Kepler’s laws to find the distance (in astronomical units) between the planet (unofficially named Bellerophon) and its star. SHOW YOUR WORK! 6.  How does halving the distance between two objects affect the gravitational force between them? 7. Suppose the Sun were somehow replaced by a star with five times as much mass. What would happen to the gravitational force between…

1. For a fixed baseline, at what point does parallax cease to be an accurate technique for measuring distance?  2. What are two ways that you could more accurately measure the distance to an object using parallax?

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

If our universe is expanding, what are the implications for the separation between two stars within our galaxy?   A. The two stars are moving farther apart.   B. The two stars are moving closer together.   C. The distance between the two stars is unaffected.    D. The question is impossible to answer without more information.

On Earth, the parallax angle measured for the star Procyon is 0.29 arcseconds. If you were to measure Procyon's parallax angle from Venus, what would the parallax angle be? (Note: Earth's orbital radius is larger than Venus's orbital radius.) A. more than 0.29 arcseconds B. 0.29 arcseconds C. less than 0.29 arcseconds D.zero arcseconds (no parallax)

If you live at a location on the Earth’s northern hemisphere, when will the longest day of the year be? a.vernal equinox b.winter solstice c.summer equinox d.summer solstice e.winter equinox The history of the universe described by the Big Bang theory is separated into different eras. During which era was the predominant temperature of the Universe about 1 million Kelvin? a.The Plank Era b.The GUT Era c.The Electroweak Era d.The Era of Nuclei e.The Era of Atoms Some planets have very strong magnetic fields. What features must a planet have to cause this? a.both rapid rotation and a conducting liquid core b.only a rapid rotation c.only a liquid conducting core d.both a rapid rotation and a solid metallic core e.only a metallic core

1.Converting Angles a. Convert degrees to arcseconds: convert 45 degrees to arcseconds b. Convert degrees to radians: convert 45 degrees to radians

1.  A distant galaxy has an apparent magnitude of 10 and is 4,000 kpc away. What is its absolute magnitude? (Round your answer to at least one decimal place.)   The difference in absolute magnitude between two objects viewed from the same distance is related to their fluxes by the flux-magnitude relation. FA/FB= 2.51(MB − MA)       2.   How does the absolute magnitude of this galaxy compare to the Milky Way (M = −21)?

106x 103 x 1.701 x 1013 186 x 1.701 X 10 -10 -10 106,000 miles= 316.386 x 10 ' light years Exercise: One parsec is a unit of distance equal to roughly 3.25 light-years. The prefix Mega means "million." A star system 24 Mpc (Megaparsec) away from us in the direction of Orion is home to a hostile alien civilization intent on enslaving humans and forcing us to manufacture pizza sauce for their pleasure. What is the distance to these rapacious aliens in kilometers? Use your answer from the previous exercise. 000

No Service 4:59 PM @ 35% attachments.office.net 1. What is the most common element in the Universe? 2. What is the distance between the Earth and the Sun? (one word) 3. What is the point where the Earth is furthest away from the Sun? 4. What do you call the model that the Sun is at the center of the Universe? 5. What constellation is Polaris observed? 6. What is the phase of the Moon? 7. What do you call the longest day of the year in the southern hemisphere? 8. When is the longest day of the year in the southern hemisphere? 9. Over what latitude is the Sun at 12PM on the vernal equinox? 10. Who first observed sunspots? 11. Who showed that the orbit of planets around the Sun is elliptical? 12. Which planet is second furthest from the Sun? 13. Stars in a constellation are A. physically close to each other. B. usually equal in brightness. C. about the same age. D. about the same distance away. E. in the same part of the sky. 14. Who was the first astronomer to use a telescope? A. Galileo…

TRUE OR FALSE only. 1. DIURNAL MOTION is caused by the daily motion of a planet on its axis. 2. Eudoxus was the first to propose that the sun is the center of the solar system. 3. The most perfect shape of the earth and universe according to Plato is cylindrical. 4. Ancient astronomers believed that the Earth did not move because there was no stellar parallax observed. 5. Galileo's observation of the planets supported the geocentric theory. 6. The planet closest to the sun has the shortest period of revolution about the sun. 7. In the proposed model by Copernicus, the earth was at the center of the universe. 8. Epicycles refer to the circular paths taken by planets. 9. The second law of planetary motion implies that the product of the velocity and the distance from the sun remain the same as a planet moves about the sun. 10. The first law implies that there is a common principle that governs the orbital motion of the planets.

Write the following measurements in scientific notation. All answers should be written up to hundredths place. Follow the rules in rounding off numbers. Quantity Measurement Scientific notation 1. diameter of the          sun 1391400 km   2. Speed of light 2997792458 m/s   3. distance of the earth from the sun 149597870700 m   4. size of bacteria 0.0005 m   5. diameter of proton 0.000 000 000 001 mm

1. Over the course of the year, the right ascension of the Sun .... Question options:   A)  decreases   B)  increases   C)  stays the same 2. For an observer located on the equator, the altitude of the stars due West will... Question options:   A)  increase and decrease   B)  decrease   C)  increase

How does the age of the universe relate to the Hubble constant?   a. The smaller the constant, the older the universe.   b. The larger the constant, the older the universe.   c. The Hubble constant is the age of the universe.   d. The Hubble constant is the square of the universe.   e. It is impossible to tell the age of the universe from the Hubble constant.

Assuming that the earth is a perfect sphere of radius 6370 kilometers, a person at a point T on top of a tower 60 meters high looks at a point P on the surface of the earth. What is the approximate distance of P from T ? a. 27.6 km b. 26.5 km c. 25.4 km d. 24.3 km

I hope you answer this:) 1. Ancient civilizations observed and kept track of daily movement of heavenly bodies. Which one is NOT the reason for this? a. navigation purposes b. time keeping c. annual cultural cycles d. agricultural cycles   2. What Kepler's Law of Planetary Motion is related to the Newton's Law of Motion based from the statement below: The statement: "Since the planets move on ellipses they are continually accelerating." a. Law of Ellipses and Law of Acceleration b. Law of Ellipses and Law of Inertia c. Law of Equal Areas and Law of Interaction d. Law of Period and Law of Inertia e. Law of Period and Law of Acceleration   3. Edwi Hubble proposed a way to organize galaxies in 1920. How are galaxies classified? a. color of stars b. shape of galaxy c. age of stars d. composition of stars e. diameter of galaxy   4. Find the magnifying power (M) and the length (L) of a simple telescope with 30-inches focal length of the objective and 2 inches focal length of the eyepiece.…

asap 1. Imagine that an object is moving around the Sun. What will be the orbital period of the object in Earth years if its orbit has a semi-major axis 1.587 AU?

How would you solve this problem??

1. For an observer located on the equator, the altitude of the stars due West will...   A)  increase and decrease   B)  decrease   C)  increase

Question 4 please

1. What is an astronomical unit (AU)? How many meters is one AU? 2. How many seconds are in one year? 3. Are the planets accelerating as they orbit the Sun? If so, what force is acting on them to cause the acceleration? Be specific.

Which of the following pair is INCORRECT? I. Parsec - Distance II. Barrel - Liquid III. Light year - Time A) Only III B) Only I and III C) Only II D) All are correct

1. How did Aristotle differentiate terrestrial and celestial motion? Give at least one example for each.2. According to Aristotle, what will happen to an moving object if there will be no force to act on it?