An Aquarium Contains a 5-Cm Layer of Water (N =

question 18

Multiple Choice

An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461) . If the angle of incidence into the water from the carbon tetrachloride is 20°, what is the angle of refraction into the air?

• A) 20°
• B) 30°
• C) 38°
• D) 69°
• E) 26°

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Definitions:

Labor Rate Variance

The difference between the actual labor costs incurred and the expected (or standard) labor costs for the production achieved.

May

Not a term that needs defining within the given context.

Labor Efficiency Variance

The variance between the number of hours actually worked and the expected standard hours needed to achieve a specific output level, calculated using the standard labor rate.

November

The eleventh month of the Gregorian calendar, often associated with autumn in the Northern Hemisphere and spring in the Southern Hemisphere.