University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Chapter 13, Problem 26P
The mean diameter of the planet Mercury is
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The mean diameter of the planet Mercury is 4.88 × 106 m , and the acceleration due to gravity at its surface is 3.78 m/s2 . Estimate the mass of this planet.
The acceleration due to gravity on the surface of a planet is seven times as large as it is on the surface of Earth. The mass density of the planet is known to be nine times that of Earth. What is the radius of this planet in terms of Earth's radius?
The acceleration due to gravity on the surface of a planet is three times as large as it is on the surface of Earth. The mass density of the planet is known to be twice that of Earth. What is the radius of this planet in terms of Earth’s radius?
Chapter 13 Solutions
University Physics Volume 1
Ch. 13 - Check Your Understanding What happens to force and...Ch. 13 - Check Your Understanding How does your weight at...Ch. 13 - Check Your Understanding Why not use the simpler...Ch. 13 - Check Your Understanding If we send a probe out of...Ch. 13 - Check Your Understanding Assume you are in a...Ch. 13 - Check Your Understanding By what factor must the...Ch. 13 - Check Your Understanding There is another...Ch. 13 - Check Your Understanding Galaxies are not single...Ch. 13 - Check Your Understanding The nearly circular orbit...Ch. 13 - Check Your Understanding Earth exerts a tidal...
Ch. 13 - Check Your Understanding Consider the density...Ch. 13 - Action at a distance, such as is the case for...Ch. 13 - In the law of universal gravitation, Newton...Ch. 13 - Must engineers take Earth’s rotation into account...Ch. 13 - It was stated that a satellite with negative total...Ch. 13 - It was shown that the energy required to lift a...Ch. 13 - One student argues that a satellite in orbit is in...Ch. 13 - Many satellites are placed in geosynchronous...Ch. 13 - Are Kepler’s laws purely descriptive, or do they...Ch. 13 - In the diagram below for a satellite in an...Ch. 13 - As an object falls into a black hole, tidal forces...Ch. 13 - The principle of equivalence states that all...Ch. 13 - As a person approaches the Schwarzschild radius fo...Ch. 13 - Evaluate the magnitude of gravitational force...Ch. 13 - Estimate the gravitational force between two sumo...Ch. 13 - Astrology makes much of the position of the...Ch. 13 - A mountain 10.0 km from a person exerts a...Ch. 13 - The International Space Station has a mass of...Ch. 13 - Asteroid Toutatis passed near Earth in 2006 at...Ch. 13 - (a) What was the acceleration of Earth caused by...Ch. 13 - (a) Calculate Earth’s mass given the acceleratioln...Ch. 13 - (a) What is the acceleration due to gravity on the...Ch. 13 - (a) Calculate the acceleration due to gravity on...Ch. 13 - The mass of a particle is 15 kg. (a) What is its...Ch. 13 - On a planet whose radius is 1.2107m , the...Ch. 13 - The mean diameter of the planet Saturn is 1.2108m...Ch. 13 - The mean diameter of the planet Mercury is...Ch. 13 - The acceleration due to gravity on the surface of...Ch. 13 - A body on the surface of a planet with the same...Ch. 13 - Find the escape speed of a projectile from the...Ch. 13 - Find the escape speed of a projectile from the...Ch. 13 - What is the escape speed of a satellite located at...Ch. 13 - (a) Evaluate the gravitational potential energy...Ch. 13 - An average-sized asteroid located 5.0107km from...Ch. 13 - (a) What will be the kinetic energy of the...Ch. 13 - (a) What is the change in energy of a 1000-kg...Ch. 13 - If a planet with 1.5 times the mass of Earth was...Ch. 13 - Two planets in circular orbits around a star have...Ch. 13 - Using the average distance of Earth from the Sun,...Ch. 13 - What is the orbital radius of an Earth satellite...Ch. 13 - Calculate the mass of the Sun based on data for...Ch. 13 - Find the mass of Jupiter based on the fact that I0...Ch. 13 - Astronomical observatrions of our Milky Way galaxy...Ch. 13 - (a) In order to keep a small satellite from...Ch. 13 - The Moon and Earth rotate about their common...Ch. 13 - The Sun orbits the Milky Way galaxy once each...Ch. 13 - A geosynchronous Earth satellite is one that has...Ch. 13 - Calculate the mass of the Sun based on data for...Ch. 13 - I0 orbits Jupiter with an average radius of...Ch. 13 - The “mean” orbital radius listed for astronomical...Ch. 13 - The perihelion of Halley’s comet is 0.586 AU and...Ch. 13 - The perihelion of the comet Legerkvist is 2.61 AU...Ch. 13 - What is the ratio of the speed at perihelion to...Ch. 13 - Eros has an elliptical orbit about the Sun, with a...Ch. 13 - What is the difference between the force on a...Ch. 13 - If the Sun were to collapse into a black hole, the...Ch. 13 - Consider Figure 13.23 in Tidal Forces. This...Ch. 13 - What is the Schwarzschild radius for the black...Ch. 13 - What would be the Schwarzschild radius, in light...Ch. 13 - A neutron star is a cold, collapsed star with...Ch. 13 - (a) How far from the center of Earth would the net...Ch. 13 - How far from the center of the Sun would the net...Ch. 13 - Calculate the values of g at Earth’s surface for...Ch. 13 - Suppose you can communicate with the inhabitants...Ch. 13 - (a) Suppose that your measured weight at the...Ch. 13 - A body of mass 100 kg is weighed at the North Pole...Ch. 13 - Find the speed needed to escape from the solar...Ch. 13 - Consider the previous problem and include the fact...Ch. 13 - A comet is observed 1.50 AU from the Sun with a...Ch. 13 - An asteroid has speed 15.5km/s when it is located...Ch. 13 - Space debris left from old satellites and their...Ch. 13 - A satellite of mass 1000 kg is in circular orbit...Ch. 13 - After Cares was promoted to a dwarf planet, we now...Ch. 13 - (a) Using the data in the previous problem for the...Ch. 13 - What is the orbital velocity of our solar system...Ch. 13 - (a) Using the information in the previous problem,...Ch. 13 - Circular orbits in Equation 13.10 for conic...Ch. 13 - Show that for eccentricity equal to one in...Ch. 13 - Using the technique shown in Satellite Orbits and...Ch. 13 - Given the perihelion distance, p , and aphelion...Ch. 13 - Comet P/1999 R1 has a perihelion of 0.0570 AU and...Ch. 13 - A tunnel is dug through the center of a perfectly...Ch. 13 - Following the technique used in Gravitation Near...Ch. 13 - Show that the areal velocity for a circular orbit...Ch. 13 - Show that the period of orbit for two masses, m1...Ch. 13 - Show that for small changes in height h, such that...Ch. 13 - Using Figure 13.9, carefull sketch a free body...Ch. 13 - (a) Show that tidal force on a small object of...Ch. 13 - Find the Hohmann transfer velocities,...
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- Suppose the gravitational acceleration at the surface of a certain moon A of Jupiter is 2 m/s2. Moon B has twice the mass and twice the radius of moon A. What is the gravitational acceleration at its surface? Neglect the gravitational acceleration due to Jupiter, (a) 8 m/s2 (b) 4 m/s2 (c) 2 m/s2 (d) 1 m/s2 (e) 0.5 m/s2arrow_forwardThe acceleration due to gravity on the surface of a planet is three times as large as it is on the surface of Earth. The mass density of the planet is known to be twice that of Earth. What is the radius of this planet in terms of Earth’s radius?arrow_forwardLet gM represent the difference in the gravitational fields produced by the Moon at the points on the Earths surface nearest to and farthest from the Moon. Find the fraction gM/g, where g is the Earths gravitational field. (This difference is responsible for the occurrence of the lunar tides on the Earth.)arrow_forward
- On a planet whose radius is 1.2107m , the acceleration due to gravity is 18m/s2 . What is the mass of the planet?arrow_forwardIn Example 2.6, we considered a simple model for a rocket launched from the surface of the Earth. A better expression for the rockets position measured from the center of the Earth is given by y(t)=(R3/2+3g2Rt)2/3j where R is the radius of the Earth (6.38 106 m) and g is the constant acceleration of an object in free fall near the Earths surface (9.81 m/s2). a. Derive expressions for vy(t) and ay(t). b. Plot y(t), vy(t), and ay(t). (A spreadsheet program would be helpful.) c. When will the rocket be at y=4R? d. What are vy and ay when y=4R?arrow_forwardWhat is the gravitational acceleration close to the surface of a planet with a mass of 2ME and radius of 2RE where ME, and RE are the mass and radius of Earth, respectively? Answer as a multiple of g, the magnitude of the gravitational acceleration near Earths surface. (See Section 7.5.)arrow_forward
- (a) Find the magnitude of the gravitational force between a planet with mass 7.50 1024 kg and its moon, with mass 2.70 1022 kg, if the average distance between their centers is 2.80 108 m. (b) What is the acceleration of the moon towards the planet? (c) What is the acceleration of the planet towards the moon?arrow_forward(a) Given that the period of the Moons orbit about the Earth is 27.32 days and the nearly constant distance between the center of the Earth and the center of the Moon is 3.84 108 m, use Equation 13.11 to calculate the mass of the Earth. (b) Why is the value you calculate a bit too large?arrow_forwardWhat is the orbital radius of an Earth satellite having a period of 1.00 h? (b) What is unreasonable about this result?arrow_forward
- The mass of the Earth is approximately 5.98 1024 kg, and the mass of the Moon is approximately 7.35 1022 kg. The Moon and the Earth are separated by about 3.84 108 m. a. What is the magnitude of the gravitational force that the Moon exerts on the Earth? b. If Serena is on the Moon and her mass is 25 kg, what is the magnitude of the gravitational force on Serena due to the Moon? The radius of the Moon is approximately 1.74 106 m.arrow_forwardCalculate the effective gravitational field vector g at Earths surface at the poles and the equator. Take account of the difference in the equatorial (6378 km) and polar (6357 km) radius as well as the centrifugal force. How well does the result agree with the difference calculated with the result g = 9.780356[1 + 0.0052885 sin 2 0.0000059 sin2(2)]m/s2 where is the latitude?arrow_forwardUnreasonable Results (a) Based on Kepler's laws and information on the orbital characteristics of the Moon, calculate the orbital radius for an Earth satellite having a period of 1.00 h. (b) What is unreasonable about this result? (c) What is unreasonable or inconsistent about the premise of a 1.00 h orbit?arrow_forward
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