Solution Found!
(a) Digital medical thermometers determine temperature by
Chapter 20, Problem 37(choose chapter or problem)
Problem 37PE
(a) Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has α = – 0.0600 / ºC ) when it is at the same temperature as the patient. What is a patient’s temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37.0ºC (normal body temperature)? (b) The negative value for α may not be maintained for very low temperatures. Discuss why and whether this is the case here. (Hint: Resistance can’t become negative.)
Questions & Answers
QUESTION:
Problem 37PE
(a) Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has α = – 0.0600 / ºC ) when it is at the same temperature as the patient. What is a patient’s temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37.0ºC (normal body temperature)? (b) The negative value for α may not be maintained for very low temperatures. Discuss why and whether this is the case here. (Hint: Resistance can’t become negative.)
ANSWER:
Solution 37PE
a.) The final temperature of a patient’s is 40