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For a planet to have an atmosphere, gravity must be sufficient to keep the gas from escaping. The escape speed a particle needs to escape the earth's gravitational attraction is 1.1 x 10 m/s. The motion of projectiles never depends on mass, so this escape speed applies equally to rockets and to molecules in the earth's upper atmosphere. ▶ ▼ Part C The temperature of the earth's thin upper atmosphere is approximately 1000°C due to heating from the sun's ultraviolet radiation. This is a high temperature, but much lower than the temperatures you calculated in parts A and B. However, a gas can slowly escape from a planet's atmosphere if just a small fraction of the molecules have speeds that exceed the escape speed. These are the molecules at the far right of the Maxwell-Boltzmann distribution. A rule of thumb based on the Maxwell-Boltzmann distribution is that, given sufficient time, a gas can escape if Vesc < 60rms - According to this rule, what is the largest molecular mass, in atomic mass units, that can escape the earth's upper atmosphere? Express your answer in atomic mass units. m = 0.262 Submit Previous Answers Request Answer 15. ΑΣΦ Part D X Incorrect; Try Again; 3 attempts remaining Part E Can H₂ escape the earth? O Yes O No ? u

For a planet to have an atmosphere, gravity must be sufficient to keep the gas from escaping. The escape speed a particle needs to escape the earth's gravitational attraction is 1.1 x 10 m/s. The motion of projectiles never depends on mass, so this escape speed applies equally to rockets and to molecules in the earth's upper atmosphere. ▶ ▼ Part C The temperature of the earth's thin upper atmosphere is approximately 1000°C due to heating from the sun's ultraviolet radiation. This is a high temperature, but much lower than the temperatures you calculated in parts A and B. However, a gas can slowly escape from a planet's atmosphere if just a small fraction of the molecules have speeds that exceed the escape speed. These are the molecules at the far right of the Maxwell-Boltzmann distribution. A rule of thumb based on the Maxwell-Boltzmann distribution is that, given sufficient time, a gas can escape if Vesc < 60rms - According to this rule, what is the largest molecular mass, in atomic mass units, that can escape the earth's upper atmosphere? Express your answer in atomic mass units. m = 0.262 Submit Previous Answers Request Answer 15. ΑΣΦ Part D X Incorrect; Try Again; 3 attempts remaining Part E Can H₂ escape the earth? O Yes O No ? u

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Please answer Part C and E
For a planet to have an atmosphere, gravity must be sufficient to keep the gas from escaping. The escape speed a particle needs to escape the earth's gravitational attraction is 1.1 x 10¹ m/s. The motion of projectiles never depends on mass, so this escape speed applies equally to rockets and to molecules in the earth's upper atmosphere. ▼ Part C The temperature of the earth's thin upper atmosphere is approximately 1000°C due to heating from the sun's ultraviolet radiation. This is a high temperature, but much lower than the temperatures you calculated in parts A and B. However, a gas can slowly escape from a planet's atmosphere if just a small fraction of the molecules have speeds that exceed the escape speed. These are the molecules at the far right of the Maxwell-Boltzmann distribution. A rule of thumb based on the Maxwell-Boltzmann distribution is that, given sufficient time, a gas can escape if Vesc < 60rms. According to this rule, what is the largest molecular mass, in atomic mass units, that can escape the earth's upper atmosphere? Express your answer in atomic mass units. m = 0.262 IVE ΑΣΦ 1 Submit Previous Answers Request Answer Part D X Incorrect; Try Again; 3 attempts remaining Part E Can H₂ escape the earth? O Yes O No Submit ? Request Answer u
Transcribed Image Text:For a planet to have an atmosphere, gravity must be sufficient to keep the gas from escaping. The escape speed a particle needs to escape the earth's gravitational attraction is 1.1 x 10¹ m/s. The motion of projectiles never depends on mass, so this escape speed applies equally to rockets and to molecules in the earth's upper atmosphere. ▼ Part C The temperature of the earth's thin upper atmosphere is approximately 1000°C due to heating from the sun's ultraviolet radiation. This is a high temperature, but much lower than the temperatures you calculated in parts A and B. However, a gas can slowly escape from a planet's atmosphere if just a small fraction of the molecules have speeds that exceed the escape speed. These are the molecules at the far right of the Maxwell-Boltzmann distribution. A rule of thumb based on the Maxwell-Boltzmann distribution is that, given sufficient time, a gas can escape if Vesc < 60rms. According to this rule, what is the largest molecular mass, in atomic mass units, that can escape the earth's upper atmosphere? Express your answer in atomic mass units. m = 0.262 IVE ΑΣΦ 1 Submit Previous Answers Request Answer Part D X Incorrect; Try Again; 3 attempts remaining Part E Can H₂ escape the earth? O Yes O No Submit ? Request Answer u
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