Concept explainers
(a)
The average speedof a molecules.
(a)
Answer to Problem 21.44AP
Answer:The average speed of a molecules is
Explanation of Solution
Speed of molecule 1 is
Write the expression for summation of the speeds of the molecules.
Here,
Substitute
Thus, the value of summation of the speeds of the molecules is
Write the formula to calculate the average speed of a molecules.
Here,
Substitute
Conclusion:
Therefore, the average speed of a molecules is
(b)
The root mean square speed of a molecules.
(b)
Answer to Problem 21.44AP
Answer:The root mean square speed of a molecules is
Explanation of Solution
Speed of molecule 1 is
Write the expression for summation of the square of speeds of the molecules.
Substitute
Thus, the value of summation of the square of speeds of the molecules is
Write the formula to calculate the root mean square speed of a molecules.
Here,
Substitute
Conclusion:
Therefore, the root mean square speed of a molecules is
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Chapter 21 Solutions
Physics for Scientists and Engineers, Volume 1
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