Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 18.2, Problem 18.2CYU
To determine
The reason why Europa and Enceladus contain liquid water.
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Which of these is an example of an energy source that could exist on Europa (or beneath its surface) and help enable life in a Europan ocean?
a Volcanoes and/or hydrothermal vents on the seafloor
b Solar flares from the Sun that penetrate Europa's ice and send radiation into the liquid-water ocean
c Europa's rapid motion as it orbits Jupiter
d The combustion of fossils fuels beneath the surface, similar to burning coal in the Earth's crust
Mission to Titan: Titan is the largest of Saturn’s moons and the only moon in the Solar System that possesses a dense atmosphere and large liquid bodies (seas or lakes) at its surface. For these and other reasons, many exobiologists think that Titan is the most likely place in the Solar System beside Earth where life might exist. NASA is considering sending a 600 kg space probe into orbit around Titan in order to map its surface. This would be followed a few years later by a 320 kg robotic lander that would land on the surface of Titan in order to look for life. a) What would be the space probe’s velocity and orbital period if the probe were to orbit at an altitude of 70 km above the surface of Titan? b) What force would the lander’s thrusters need to produce in order to allow the lander to hover just above the surface of Titan.
We think the terrestrial planets formed around solid “seeds” that later grew over time through the accretion of rocks and metals.
a) Suppose the Earth grew to its present size in 1 million years through the accretion of particles averaging 100 grams each. On average, how many particles did the Earth capture per second, given that the mass of the Earth is = 5.972 × 10 ^24 kg ?
b) If you stood on Earth during its formation and watched a region covering 100 m^2, how many impacts would you expect to see in one hour. Use the impact rate you calculated in part a. You’ll need the following as well: the radius of the Earth is = 6.371 × 10 ^6 m and the surface area of the Earth is 4??^2Earth
Chapter 18 Solutions
Understanding Our Universe
Ch. 18.1 - Prob. 18.1CYUCh. 18.2 - Prob. 18.2CYUCh. 18.3 - Prob. 18.3CYUCh. 18.4 - Prob. 18.4CYUCh. 18 - Prob. 1QAPCh. 18 - Prob. 2QAPCh. 18 - Prob. 3QAPCh. 18 - Prob. 4QAPCh. 18 - Prob. 5QAPCh. 18 - Prob. 6QAP
Ch. 18 - Prob. 7QAPCh. 18 - Prob. 8QAPCh. 18 - Prob. 9QAPCh. 18 - Prob. 10QAPCh. 18 - Prob. 11QAPCh. 18 - Prob. 12QAPCh. 18 - Prob. 13QAPCh. 18 - Prob. 14QAPCh. 18 - Prob. 15QAPCh. 18 - Prob. 16QAPCh. 18 - Prob. 17QAPCh. 18 - Prob. 18QAPCh. 18 - Prob. 19QAPCh. 18 - Prob. 20QAPCh. 18 - Prob. 21QAPCh. 18 - Prob. 22QAPCh. 18 - Prob. 23QAPCh. 18 - Prob. 24QAPCh. 18 - Prob. 25QAPCh. 18 - Prob. 26QAPCh. 18 - Prob. 27QAPCh. 18 - Prob. 28QAPCh. 18 - Prob. 29QAPCh. 18 - Prob. 30QAPCh. 18 - Prob. 31QAPCh. 18 - Prob. 32QAPCh. 18 - Prob. 33QAPCh. 18 - Prob. 34QAPCh. 18 - Prob. 35QAPCh. 18 - Prob. 36QAPCh. 18 - Prob. 37QAPCh. 18 - Prob. 38QAPCh. 18 - Prob. 41QAPCh. 18 - Prob. 42QAPCh. 18 - Prob. 43QAPCh. 18 - Prob. 44QAPCh. 18 - Prob. 45QAP
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- Surprisingly, the New Horizons probe took pictures of Pluto and found a. ongoing volcanic eruptions b. mountain ranges c. lakes of methane d. a lot of impact craters Pluto and other "dwarf planets" are not considered proper planets because a. they don't have any moons b. they are members of belts like the asteroid and Kuiper belts c. they don't have atmospheres d. their orbital inclinations are too high e. their orbits are too eccentric Which of these planets has never had an artificial satellite? a. Neptune b. Saturn c. Mars d. Jupiter e. Venusarrow_forwardFill out this data table with information you have collected about the solar system planets. Characteristics Unit Mercury Venus Earth 330 10 g 4,870 5,970 Mass 61 928 1,083 Volume 1024 cm 5.4 5.4 50 Density g/cm Distance from Sun 58 10° km 100 100 Radius km Crust Thickness km Atmosphere Height km Axial Tilt degrees Force of Gravity on a1 kg test mass N Length of Day 4223 4,223 88 hours 225 365 Length of Orbit Earth days 88 167 464 15 Mean Temperature ° C ТЕВОС Mars Jupiter Saturn Uranus Neptune 102,000 642 | 1,898,000 568.000 86,800arrow_forwardWhat is the range of density for the outer planets (in g/cm3)? 1.2 to 5.5 2.2 to 5.5 2.2 to 6.5 3.3 to 7.2 none of thesearrow_forward
- Miller’s Planet part I: This planet is described as having 130% Earth gravity What is the acceleration due to gravity on the surface of this planet? 7 m/s2 130 m/s2 13 m/s2 Miller’s Planet part II: What is the source of the waves on this planet? Wind Tidal stress due to proximity of Gargantua Plate tectonic driven Miller-quakes Miller’s Planet Part III: Why would it be unlikely that this planet could sustain an atmosphere let alone liquid water on its surface. Gargantua’s accretion disk likely emits X-rays, UV rays and possibly gamma radiation Miller’s planet’s surface gravity is too small Miller’s planet has no magnetic fieldarrow_forwardThe table to the right gives size and distance data for the planets at a certain point in time. Calculate the scaled size and distance for each planet using a 1 to 10 billion scale model solar system. Planet Diameter Distance from Sun Mercury 4880 km 65.1 million km Venus 12,100 km 108.8 million km Earth 12,760 km 147.5 million km Mars 6790 km 244.6 million km Jupiter 143,000 km 807.2 million km Saturn 120,000 km 1406 million km Uranus 52,000 km 2938 million km Neptune 48,400 km 4508 million kmarrow_forwardExplain how the terrestrial planets and the Jovian planets ended up so different.arrow_forward
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