KVPY SA Exam 2014 Question Paper

Question : 39 of 80

Marks: +1, -0

At room temperature, the average speed of Helium is higher than that of Oxygen by a factor of

Solution:

Average speed

(r_\avg) = √{{8RT}/{πM}}

r_\He/r_{O_2}=√{32/4}=2√2

r_\He=r_{O_2}2√2

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