Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 9, Problem 32E
In the future, astronomers discover a solid moon around a planet orbiting one of the nearest stars. This moon has a diameter of 1948 km and a mass of
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What is the gravitational field strength on the surface of a moon with a mass of 3.7x1021 Kg and a radius of 8.4 x 105 m?
A certain planet has a radius of 4990 km. If, on the surface of that planet, a 95.0 kg object has a weight of 591 N, then what is the mass of the planet?
What would be the gravitational pull of the moon on an astronaut with a total mass of 125kg with a spacesuit on? Please use the following information. (Diameter of moon = 3,474 km and mass of moon = 7.3476x1022 kg.)
a.) 50.76
b.) 50.67
c.) 220.95
Chapter 9 Solutions
Astronomy
Ch. 9 - What is the composition of the Moon, and how does...Ch. 9 - Why does the Moon not have an atmosphere?Ch. 9 - What are the principal features of the Moon...Ch. 9 - Frozen water exists on the lunar surface primarily...Ch. 9 - Outline the main events in the Moon’s geological...Ch. 9 - What are the maria composed of? Is this material...Ch. 9 - The mountains on the Moon were formed by what...Ch. 9 - With no wind or water erosion of rocks, what is...Ch. 9 - What differences did Grove K. Gilbert note between...Ch. 9 - Explain how high-speed impacts form circular...
Ch. 9 - Explain the evidence for a period of heavy...Ch. 9 - How did our exploration of the Moon differ from...Ch. 9 - Summarize the four main hypotheses for the origin...Ch. 9 - What are the difficulties with the capture...Ch. 9 - What is the main consequence of Mercury’s orbit...Ch. 9 - Describe the basic internal structure of Mercury.Ch. 9 - How was the rotation rate of Mercury determined?Ch. 9 - What is the relationship between Mercury’s...Ch. 9 - The features of Mercury are named in honor of...Ch. 9 - What do our current ideas about the origins of the...Ch. 9 - One of the primary scientific objectives of the...Ch. 9 - Apollo astronaut David Scott dropped a hammer and...Ch. 9 - Galileo thought the lunar maria might be seas of...Ch. 9 - Why did it take so long for geologists to...Ch. 9 - How might a crater made by the impact of a comet...Ch. 9 - Why are the lunar mountains smoothly rounded...Ch. 9 - The lunar highlands have about ten times more...Ch. 9 - At the end of the section on the lunar surface,...Ch. 9 - Give several reasons Mercury would be a...Ch. 9 - If, in the remote future, we establish a base on...Ch. 9 - The Moon has too little iron, Mercury too much....Ch. 9 - In the future, astronomers discover a solid moon...Ch. 9 - The Moon was once closer to Earth than it is now....Ch. 9 - Astronomers believe that the deposit of lava in...Ch. 9 - The Moon requires about 1 month (0.08 year) to...
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- Calculate the values of g at Earth’s surface for the following changes in Earth’s properties: (a) its mass is doubled and its radius is halved; (b) its mass density is doubled and its radius is unchanged; (c) its mass density is halved and its mass is unchanged.arrow_forwardComet Halley (Fig. P11.21) approaches the Sun to within 0.570 AU, and its orbital period is 75.6 yr. (AU is the symbol for astronomical unit, where 1 AU = 1.50 1011 m is the mean EarthSun distance.) How far from the Sun will Halleys comet travel before it starts its return journey?arrow_forwardScientists have discovered a distant planet with a mass of 6.0x1023 kg. The planet has a small moon that orbits with a period of 5 hours and 40 minutes. Use only this information (and the value of G) to calculate the radius of the moon's orbit (in units of 106 m).arrow_forward
- A moon is observed to orbit a planet with a period = 3.551 days and at a distance = 670,900 km from the planet. Assuming the moon has a much smaller mass than the planet, estimate the mass of the planet and express your answer in units of the Earth's mass (Earth's mass = 5.97 x 1024 kg) .arrow_forwardCalculate the mass of an astronaut that weighs 291N on the surface of the moon; the gravity of the moon is 1/6 of the earth. a.30 kg b.1.8 x 102 Kg c.4.7 x 102 kg d.5.6 x 10-3kgarrow_forwardA 70-kg person is standing on earth surface. Calculate the gravitational attraction on the person by the moon (mass of moon = 7.3*1022 kg, moon’s radius = 1737 km, earth-moon distance = 384400 km). a) 8.9*105 N b) 113 N c) 0.002 Narrow_forward
- On the surface of the Moon an astronaut has a weight of Fg = 190 N. The radius of the Moon is Rm = 1.74 × 106 m, the gravitational constant is G = 6.67 × 10-11 N (m/kg)2 and the mass of the Moon is Mm = 7.35 × 1022 kg. Calculate the mass of the astronaut, m, in kilograms.arrow_forwardWhich of the following is a measurable effect of the tidal interactions between the Earth and the moon? choose 1 of the following: a. The moon is constantly getting closer to the Earth, and will one day collide with our planet. b. The rotation rate of the Earth is gradually slowing down. c. The rotation rate of the moon is gradually speeding up. d. The moon pulls more strongly on the far side of the Earth than it does on the near side.arrow_forwardThe mass of Earth is 5.97e24 kg, the mass of the Moon is 7.35e22 kg, and the mean distance of the Moon from the center of Earth is 3.84e5 km. Use these data to calculate the magnitude of the gravitational force exerted by Earth on the Moon.arrow_forward
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