A planet has two moons of equal mass. Moon 1 is in circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. What is the magnitude of the gravitational force exerted by the planet on Moon 2? a. Four times as large as that on Moon 1 b. Twice as large as that on Moon 1 c. Equal to that on Moon 1 d. Half as large as that on Moon 1 e. One fourth as large as that on Moon 1

A planet has two moons of equal mass. Moon 1 is in circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. What is the magnitude of the gravitational force exerted by the planet on Moon 2? a. Four times as large as that on Moon 1 b. Twice as large as that on Moon 1 c. Equal to that on Moon 1 d. Half as large as that on Moon 1 e. One fourth as large as that on Moon 1

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter17: Mercury, Venus, And Mars

Section: Chapter Questions

Problem 2DQ: Imagine that you visit a planet orbiting another star and discover that it is heavily cratered, but...

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Imagine that you visit a planet orbiting another star and discover that it is heavily cratered, but its small moon is nearly crater free. Why would that be a surprise? Speculate about what might have happened to those objects.
Q1. A planet has two moons of equal mass. Moon 1 is in circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. What is the magnitude of the gravitational force exerted by the planet on Moon 2? a. Four times as large as that on Moon 1 b. Twice as large as that on Moon 1 c. Equal to that on Moon 1 d. Half as large as that on Moon 1 e. One fourth as large as that on Moon 1 Q2. Superman stands on a top of very tall mountain and throws a baseball horizontally with a speed such that the baseball goes into a circular orbit around the earth While the baseball is in the orbit, what is the magnitude of the acceleration of the ball? a. It depends on how fast the baseball is thrown b. It is zero because the ball does not fall to the ground c. It is slightly less than 9.80m/s^2 d. It is equal to 9.80m/s^2 Q3. A comet moves in an elliptical orbit around the sun. Which point in its orbit (perihelion or aphelion) represent the highest value of a. The speed of the comet b. The…
Name Date Use the table to answer questions 13 through 15. NAME DISTANCE FROM AVERAGE ΤΥΡΕ ORBIT DIAMETER SUN (Million Miles) (Earth Days) (Miles) 3,032 TEMPERATURE ('C) Mercury 35 5,800 Terrestrial 88 Venus 67 260 Terrestrial 224 7,521 Earth 93 365 7,926 15 Terrestrial Mars 142 260 Terrestrial 687 4,222 Jupiter 484 2150 Gas 4332 88,846 74,898 31,763 Saturn 887 2170 Gas 10755 Uranus 1,784 2200 Gas 30687 Neptune 2,795 2220 Gas 60190 30,778
The rotation of the planets around the sun is governed by: A. The gravitational field of the sun. B. The gravity of the stars. C. The heat energy of the sun. D. The gravity of the other planets of the solar system. Kelper's second law relates between them: O A. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the sun. OB. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the earth. C. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the moon. OD. The time period of rotation of the orbiting planet around the earth and the average distance of the planet to the sun.
23. Planet Alpha has the same radius and 4 times the mass of the Earth. What is the best estimate for the magnitude of the gravitational field at the surface of planet Alpha? a. 10 m/s? b. 2.5 m/s? c. 20 m/s? d. 40 m/s? 24. The planet Theta has 3 times the gravitational field strength and 4 tirmes the mass of the Earth. How does the radius of Theta compare with the radius of Earth? a. rTheta = rEarth 2 b. rTheta = E"Earth 4 C. TTheta =-TEarth 3 d. TTheta VZrEarth
a) The asteroid Ida has a small satellite orbiting it called Dactyl. Dactyl orbits Ida at a distance of about 90 km, with a period of about 8 hours. Calculate the mass of Ida. b) Mars has two moons, Phobos and Deimos. Phobos orbits Mars with an orbital period of 8 hours while Deimos orbits every 30.3 hours. What are the semi-major axes of each satellite? c) On the night side of Venus, we find that the brightest wavelength, that is the wavelength this region of the planet is emitting the most energy, is about 3.9 micrometers (3.9x10-6 meters). Approximately how warm is the planet in this region?
a. What is a repeat ground-track orbit? b. Explain why repeat ground-track and Sun-synchronous orbits are typically used for Earth observation missions. = c. The constraint for a Sun-synchronous and repeat ground-track orbit is given by T 86, 400, where T is the orbital period in seconds, m the number of days and k the number of revolutions. Explain why this is, in fact, a constraint on the semi-major axis of the orbit. m
7. The brightest four moons of Jupiter were discovered by Galileo with one of his earliest telescopes. These moons, lo, Europa, Ganymede, and Callisto, are called the Galilean moons in his honour. Some of the available data about these moons are given below. MOON r (km) V T (earthyears) 0.004837 lo a. Europa Ganymede Callisto 4.219 x 105 6.712 x 105 1.853 x 106 0.0195884 The radii are from the centre of Jupiter to the centre of the moon in question. One earth year has 365 days. Using the data for above, find the mass of Jupiter. Be specific as to which line of data was used and why. Show all work.
3. What is the gravitational field strength at the surface of Venus? 4. Calculate the escape velocity of the Jupiter
6 Why isn't there a planet where the asteroid belt is located? A The temperature in this portion of the solar nebula was just right to prevent rock from sticking together. B C D There was too much rocky material to form a terrestrial planet, but not enough gaseous material to form a jovian planet. There was not enough material in this part of the solar nebula to form a planet. Gravitational tugs from Jupiter prevented material from collecting together to form a planet. E A planet once formed here, but it was broken apart by a catastrophic collision.
3. Ganymede is a moon of Jupiter. It has a mass of 1.48 x1023 kg and a radius of 2,634 km. a) What is the gravitational force felt by a 1 kg object on the surface of Ganymede? b) What is the free-fall acceleration of the 1-kg object? What is the free-fall acceleration of a wrench (m=2.80 kg) on Ganymede? c) An astronaut on Ganymede throws a wrench up to her partner who is standing on top of a small cliff nearby. The first astronaut throws the wrench with a speed of 8.50 m/s at an angle of 62° above horizontal. The base of the cliff is 26.0 m away from the first astronaut. The second astronaut catches the wrench right at the edge of the cliff. How tall is the cliff? (There is no air on Ganymede, so you can neglect air resistance.)
When tidal bulges are NOT in a direct Earth-moon line but slightly ahead of the moon, a. Earth’s gravity weakens. b. their gravitational field pulls the moon forward in its orbit, causing it to recede from Earth. c. their gravitational field pulls the moon back in its orbit, causing the moon to fall toward Earth. d. Earth’s gravity strengthens, causing the moon to orbit faster. e. the tidal bulges have no effect on the moon.