Transmission Of Heat Question 347
Question: A bucket full of hot water is kept in a room and it cools from $ 75{}^\circ C $ to $ 70{}^\circ C~ $ in $ T _{1} $ minutes, from $ 70{}^\circ C $ to $ 65{}^\circ C $ in $ T _{2} $ minutes and from $ 65{}^\circ C $ to $ 60{}^\circ C~ $ in $ T _{3} $ minutes. Then
Options:
A) $ T _{1}=T _{2}=T _{3} $
B) $ T _{1}<T _{2}<T _{3} $
C) $ T _{1}>T _{2}>T _{3} $
D) $ T _{1}<T _{3}<T _{2} $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] More the initial temperature more is the rate of cooling. Hence, $ T _{3}>T _{2}>T _{1} $ OR The rate of cooling decreases with decrease in temperature difference between body and surrounding.
BETA
