A Speaker Is Designed for Wide Dispersion for a High

question 39

Multiple Choice

A speaker is designed for wide dispersion for a high frequency sound.What should the diameter of the circular opening be for a speaker where the desired diffraction angle is 11° and a 9100 Hz sound is generated? The speed of sound is 343 m/s.

• A)0.039 m
• B)0.077 m
• C)0.24 m
• D)0.13 m
• E)0.048 m

Understand the purposes and importance of statistics in various contexts.

Differentiate between types of graphs and their uses in displaying data.

Identify appropriate measures of central tendency and variability, especially in the presence of outliers.

Distinguish between different types of variables (qualitative, quantitative, latent, etc.) and scales of measurement (nominal, ordinal, interval, ratio).

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Definitions:

Direct Materials Cost Variance

A measure that evaluates the difference between the actual costs of direct materials used in production and the standard costs.

Direct Materials Price Variance

Direct materials price variance is the difference between the actual cost of direct materials used in production and the standard cost, indicating how much more or less was spent than expected.

Direct Materials Quantity Variance

The difference between the actual quantity of materials used in production and the standard quantity expected, multiplied by the standard cost per unit.

Flexible Budget Sales

Projected sales figures that can adjust based on changes in production levels or market conditions.