Jane makes coffee with water from an urn which is at a temperature of 90 deg...
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Jane makes coffee with water from an urn which is at a temperature of 90 deg C. Jane carries a thermometer with her at all times and notes that 6 minutes later her coffee has cooled to 70 deg C. The room is not air-conditioned, and is 30 deg C. Suppose the temperature T follows Newton's Law of Cooling (note that this is slightly different to, but equivalent to, the form given in lectures): T(t)= Ta + CKt/6 where t is the number of minutes after the coffee was made. (a) Enter the value of Ta (b) Enter the value of C. (c) Enter the exact value of K (as a fraction, not decimal approximation). (d) Enter the coffee's temperature after ten minutes, rounded to the nearest degree. (e) After how many minutes has the coffee's temperature dropped to 60 degrees? Answer in minutes, rounded to one decimal place. Jane makes coffee with water from an urn which is at a temperature of 90 deg C. Jane carries a thermometer with her at all times and notes that 6 minutes later her coffee has cooled to 70 deg C. The room is not air-conditioned, and is 30 deg C. Suppose the temperature T follows Newton's Law of Cooling (note that this is slightly different to, but equivalent to, the form given in lectures): T(t)= Ta + CKt/6 where t is the number of minutes after the coffee was made. (a) Enter the value of Ta (b) Enter the value of C. (c) Enter the exact value of K (as a fraction, not decimal approximation). (d) Enter the coffee's temperature after ten minutes, rounded to the nearest degree. (e) After how many minutes has the coffee's temperature dropped to 60 degrees? Answer in minutes, rounded to one decimal place.
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Related Book For
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
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