Question

A thermometer reading a 75oF is taken out where the temperature is 20oF. The reading is 30oF, 4 minutes later. Find the thermometer reading 7 minutes after the thermometer was brought outside and the time taken for the reading to drop from 75oF to within a half degree of the air temperature

Answer 1

Step-by-step explanation:

coefficient of heat decapitation be k

30 = k (75-30) * 4 / (75-20)

k = 30*55/(4*45)

hence the required temperature is

T = k (75-30)*7/(75-20)

Answer 2

Step-by-step explanation:

there is a answer of your question and please mark me as brainlist