A researcher at The Consolidated Dry Bean and Industrial Lubricants Corporation
ID: 490836 • Letter: A
Question
A researcher at The Consolidated Dry Bean and Industrial Lubricants Corporation wishes to test the initial hydration rate and equilibrium moisture content of chickpeas. This test Involves measuring the initial hydration rates and equilibrium moisture contents of chickpeas with a large radius versus chickpeas with a small radius. Deionized water is used as a soaking solution. The chickpeas have been selectively bred to be perfectly spherical.
The researcher formulates the following null hypotheses:
Null hypothesis 1: The initial hydration rate will be independent of the radius.
Null hypothesis 2: The equilibrium moisture content will be independent of the radius.
a) will hypothesis 1 be rejected or confirmed? Why?
b) will hypothesis 2 be rejected or confirmed? Why?
Explanation / Answer
a) Hypothesis will be rejected as radius increases surface area of chickpeas increases. So chickpeas with large radius hydration will be fast compare to smaller one.
b) hypothesis will be confirmed, The equilibrium moisture content (EMC) is the moisture content at which the substance is neither gaining nor losing moisture; this however, is a dynamic equilibrium and changes with relative humidity and temperature.
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