
Concept explainers
Interpretation:
The speed at which the target is moving and the time taken for the target to travel are to be calculated. The speed of the
Concept introduction:
The circumference of a cylinder is calculated as follows:
Here,
The time taken iscalculated as follows:
The root mean square speed for molecules is calculated as
Here,

Answer to Problem 146AP
Solution:
(a)
(b)
(c)
Explanation of Solution
Given information:
Temperature
Distance
a)The speed at which the target is moving
Calculate the radius as follows:
Substitute
The circumference of a cylinder is calculated as
Substitute
In 1centimetre, there are
Convert centimetre to meter as follows:
The target speed can be calculated as follows:
Substitute
Hence, the speed of the target is
b) The time it takes for target to cover distance
In 1centimetre, there are
Convert centimetre to meter as follows:
The time taken iscalculated as
Substitute
Hence, the time taken by the target to travel
c)
The distance is
In 1centimetre, there are
Convert centimetre to meter as follows:
Calculate the speed as follows:
Substitute
The temperature is
The conversion of temperature from degree Celsius to Kelvin is done by using the formula given below:
The molar mass of bismuth is
The root mean square speed for a moleculeis calculated as
Substitute
So, the rms value of speed for bismuth is
Hence, the rmsvalue of the speed for bismuth is
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