Question

What is the formula for Newton’s law of cooling?

(a) \(\frac{dθ}{dt}\) = KA (θ-θ0)

(b) \(\frac{dθ}{dt}\) = KA (θ+θ0)

(c) \(\frac{dθ}{dt}\) = KA (θ*θ0)

(d) \(\frac{dθ}{dt}\) = KA (θ/θ0)

The question was asked in an internship interview.

I'm obligated to ask this question of Cooling System in section Fuel Supply and Cooling System of Farm Machinery

Answer 1

The correct answer is (a) \(\frac{dθ}{dt}\) = KA (θ-θ0)

Best explanation: Newton’s law of cooling states that, the rate of heat radiated or lost by a body is directly proportional to the excess temperature, provided that the excess temperature is less as compared to the surrounding temperature.