At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere?(Given: Mass of oxygen molecule(m)=2.76×10−26kg Boltzmann's constant kB=1.38×10−23JK−1)
2.508×104K
5.016×104K
8.360×104K
1.254×104K
A
2.508×104K
B
5.016×104K
C
1.254×104K
D
8.360×104K
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Solution
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Since, Vesc=11.2km/s
R.M.S. = √3KTM
√3KTM=11200
T=112002×2.76×10−263×1.38×10−23
T=8.360×104K
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At what temperature will the rms speed of oxygen molecules becomes just sufficient to escape from the earth's atmosphere?(Given: Mass of oxygen molecule (m)=2.76×10−26kg, Boltzmann constant i.e. kB=1.38×10−23JK−1)