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Motion In Straight Line

Question
CBSEENPH11017760
Wired Faculty App

Why does hydrogen gas escape faster than oxygen from the earth’s atmosphere?

Solution
Root mean square velocity of gas molecule is given by, 
                    straight v subscript straight r equals square root of fraction numerator 3 kT over denominator straight m end fraction end root 
i.e.               space space space straight v subscript straight r proportional to square root of 1 over straight m end root 
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∴                space space straight v subscript hyd equals 4 space straight v subscript oxy 
That is, escape velocity of hydrogen is 4 times that of the escape velocity of oxygen gas. 
Hence, hydrogen gas has more tendency to escape than oxygen from the Earth's atmosphere. 

Some More Questions From Motion in Straight Line Chapter

What is rest?

What is motion?

Is absolute rest or absolute motion possible?

What is the most essential thing to study the motion of a body?

Can a body be always at rest in some frame?

Can a body be in motion in the frame associated with the body itself?

When an object in motion can be considered as particle or point object?

Can you think of physical phenomena involving the moon in which moon cannot be treated as particle?

A train is crossing the bridge. Can it be taken as a particle?

Can a train be taken a particle? Give an example in support of your answer.

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