P1B.7 Calculate the escape velocity (the minimum initial velocity that will take an object to in nity) from the surface of a planet of radius R. What is the value for (i) the Earth, R = 6.37 × 106 m, g = 9.81 m s−2, (ii) Mars, R = 3.38 ×106 m, mMars/mEarth = 0.108. At what temperatures do H2, He, and O2 molecules have mean speeds equal to their escape speeds? What proportion of the molecules have enough speed to escape when the temperature is (i) 240 K, (ii) 1500 K? Calculations of this kind are very important in considering the composition of planetary atmospheres.
P1B.7 Calculate the escape velocity (the minimum initial velocity that will take an object to in nity) from the surface of a planet of radius R. What is the value for (i) the Earth, R = 6.37 × 106 m, g = 9.81 m s−2, (ii) Mars, R = 3.38 ×106 m, mMars/mEarth = 0.108. At what temperatures do H2, He, and O2 molecules have mean speeds equal to their escape speeds? What proportion of the molecules have enough speed to escape when the temperature is (i) 240 K, (ii) 1500 K? Calculations of this kind are very important in considering the composition of planetary atmospheres.
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter13: Temperature, Kinetic Theory, And The Gas Laws
Section: Chapter Questions
Problem 27PE: In the text, it was shown that N/V=2.681025m3 for gas at STP. (a) Show that this quantity is...
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P1B.7 Calculate the escape velocity (the minimum initial velocity that will take an object to in nity) from the surface of a planet of radius R. What is the value for (i) the Earth, R = 6.37 × 106 m, g = 9.81 m s−2, (ii) Mars, R = 3.38 ×106 m, mMars/mEarth = 0.108. At what temperatures do H2, He, and O2 molecules have mean speeds equal to their escape speeds? What proportion of the molecules have enough speed to escape when the temperature is (i) 240 K, (ii) 1500 K? Calculations of this kind are very important in considering the composition of planetary atmospheres.
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