Hey all, I’m taking a biology course and am struggling with my professor not explaining things well. We have an exam coming up and she posted a practice exam, the answer key she gave had many incorrect answers on it. This is a question that I challenged; I think the answer is B. Professor maintains that the answer is C, but can not explain it in a way I understand. Aside from the fact that A. and C. are basically the same response, if C is correct, can someone Eli5?
20) Your throat is dry, and you want the last cough drop in the box to last a long time in your mouth. What should you do?
A) Break the cough drop into little pieces and put them all in your mouth. Since each little piece must be dissolved separately, the drop will last longer.
B) Keep the cough drop whole. This maintains the largest surface-to-volume ratio and slows the dissolution of the cough drop.
C) Break the cough drop into little pieces and put them all in your mouth. This decreases the surface-to-volume ratio and slows the dissolution of the cough drop.
D) It doesn’t matter if the cough drop is in one piece or many pieces; the total amount of cough drop is all that matters.
In: 1
I’m pretty sure that the answer and explanation for B and C are reversed. Keeping it in one piece maintains a low surface to volume ratio and breaking it up increases the surface to volume ratio.
So B has the correct “answer”, but C has the correct “explanation”.
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