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A hot body, obeying Newton's law of cooling is cooling down from its peak value 80ºC to an ambient temperature of 30ºC. It takes 5 minutes in cooling down from 80°C to 40°C. How much time will it take to cool down from 62°C to 32°C? (Given ln 2 = 0.693, ln 5 = 1.609)
  • a)
    9.6 minutes
  • b)
    6.5 minutes
  • c)
    8.6 minutes
  • d)
    3.75 minutes
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A hot body, obeying Newtons law of cooling is cooling down from its pe...

ln 5 = 5c = 1.609
ln 16 = ct = 4 × 0.693
t = 8.6 min
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A hot body, obeying Newtons law of cooling is cooling down from its pe...
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A hot body, obeying Newtons law of cooling is cooling down from its peak value 80ºC to an ambient temperature of 30ºC. It takes 5 minutes in cooling down from 80°C to 40°C. How much time will it take to cool down from 62°C to 32°C? (Given ln 2 = 0.693, ln 5 = 1.609)a)9.6 minutesb)6.5 minutesc)8.6 minutesd)3.75 minutesCorrect answer is option 'C'. Can you explain this answer?
Question Description
A hot body, obeying Newtons law of cooling is cooling down from its peak value 80ºC to an ambient temperature of 30ºC. It takes 5 minutes in cooling down from 80°C to 40°C. How much time will it take to cool down from 62°C to 32°C? (Given ln 2 = 0.693, ln 5 = 1.609)a)9.6 minutesb)6.5 minutesc)8.6 minutesd)3.75 minutesCorrect answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A hot body, obeying Newtons law of cooling is cooling down from its peak value 80ºC to an ambient temperature of 30ºC. It takes 5 minutes in cooling down from 80°C to 40°C. How much time will it take to cool down from 62°C to 32°C? (Given ln 2 = 0.693, ln 5 = 1.609)a)9.6 minutesb)6.5 minutesc)8.6 minutesd)3.75 minutesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A hot body, obeying Newtons law of cooling is cooling down from its peak value 80ºC to an ambient temperature of 30ºC. It takes 5 minutes in cooling down from 80°C to 40°C. How much time will it take to cool down from 62°C to 32°C? (Given ln 2 = 0.693, ln 5 = 1.609)a)9.6 minutesb)6.5 minutesc)8.6 minutesd)3.75 minutesCorrect answer is option 'C'. Can you explain this answer?.
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