Fundamentals of Physics Extended
10th Edition
ISBN: 9781118230725
Author: David Halliday, Robert Resnick, Jearl Walker
Publisher: Wiley, John & Sons, Incorporated
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Chapter 19, Problem 39P
At what temperature does the rms speed of (a) (molecular hydrogen) and (b) O2 (molecular oxygen) equal the escape speed from Earth (Table 13-2)? At what temperature does the rms speed of (c) H2 and (d) O2 equal the escape speed from the Moon (where the gravitational acceleration at the surface has magnitude 0.16g)? Considering the answers to parts (a) and (b), should there be much (e) hydrogen and (f) oxygen high in Earth's upper atmosphere, where the temperature is about 1000 K?
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The escape velocity of any object from earth is 11.2 km/s.
a) express this speed in m/s and km/h. speed, m/s:
speed,km/h:
b) at what temperature would oxygen molecules (molecular mass is equal to 32 g/mol) have an average velocity, v rms, equal to earths escape velocity 11.2km/s?
temperature: K
At what temperature does the rms speed of (a) H2 (molecular hydrogen) and (b) O2 (molecular oxygen) equal the escape speed from Earth? At what temperature does the rms speed of (c) H2 and (d) O2 equal the escape speed from the Moon (where the gravitational acceleration at the surface has magnitude 0.16g)? Considering the answers to parts (a) and (b), should there be much (e) hydrogen and (f) oxygen high in Earth’s upper atmosphere, where the temperature is about 1000 K?
(a) Hydrogen molecules (molar mass is equal to 2.016 g/mol) have vrms equal to 193 m/s. What is the temperature? (b) Much of the gas near the Sun is atomic hydrogen (H rather than H2). Its temperature would have to be 1.5 × 107 K for the rms speed vrms to equal the escape velocity from the Sun. What is that velocity?
Chapter 19 Solutions
Fundamentals of Physics Extended
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