A Device Used to Measure the Speed, V, of Molecules $\omega$

question 70

Multiple Choice

A device used to measure the speed, v, of molecules is shown below. When the cylinder is rotated, only molecules that are of the right speed will pass through the slanted slot and be pickup by the detector. Drive an expression for the speed v in terms of the angular speed, $\omega$ , $\phi$ , and L. L is the length of the cylinder and $\phi$ is the angle subtended by the slanted slot.

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Definitions:

Ratio Level

A scale of measurement where there is a true zero point, allowing for the comparison of absolute magnitudes and the calculation of ratios.

Measurement Precision

The degree to which repeated measurements under unchanged conditions show the same results.

Nominal Levels

The simplest form of categorization of data without any order or rank among the categories, where numbers serve merely as labels.

Mutually Exclusive

Events or conditions that cannot occur at the same time.