Two persons A and B are served with 150 gm of hot (90°C) tea in cups and they are provided with cold milk (15°C), separately, in a thermos flask. Mr. A immediately adds 50 gm of milk to his cup of tea and waits for five minutes before he starts sipping. Mr. B adds the same amount of milk to his cup after five minutes and they both start drinking simultaneously. Who drinks a hotter tea? The room temperature is given to be 25°C. (Assume that the specific heats of the tea, milk and mixture are the same and equal to unity. Also assume that the value of the cooling constant k is same for tea and the tea-milk mixture.)
Two persons A and B are served with 150 gm of hot (90°C) tea in cups and they are provided with cold milk (15°C), separately, in a thermos flask. Mr. A immediately adds 50 gm of milk to his cup of tea and waits for five minutes before he starts sipping. Mr. B adds the same amount of milk to his cup after five minutes and they both start drinking simultaneously. Who drinks a hotter tea? The room temperature is given to be 25°C. (Assume that the specific heats of the tea, milk and mixture are the same and equal to unity. Also assume that the value of the cooling constant k is same for tea and the tea-milk mixture.)
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Two persons A and B are served with 150 gm of hot (90°C) tea in cups and they are
provided with cold milk (15°C), separately, in a thermos flask. Mr. A immediately adds 50 gm of milk
to his cup of tea and waits for five minutes before he starts sipping. Mr. B adds the same amount of
milk to his cup after five minutes and they both start drinking simultaneously. Who drinks a hotter
tea? The room temperature is given to be 25°C.
(Assume that the specific heats of the tea, milk and mixture are the same and equal to unity. Also
assume that the value of the cooling constant k is same for tea and the tea-milk mixture.)
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