Download the app

Heat transfer-Radiation

Unlock the full solution & master the concept.

Get a detailed solution and exclusive access to our masterclass to ensure you never miss a concept
By Expert Faculty of Sri Chaitanya
Question

A body cools down from 60°C to 55°C in 30 s. Using Newton’s law of cooling, calculate the approximate time taken by same body to cool down from 5 5°C
to 50°C. Assume that the temperature of surroundings is 45°C.

Moderate
Solution

 According to Newton’s law of cooling
θ1θ2t=Kθ1+θ22θ0
605530=K60+55245……………(i)
Similarly, for 2nd case,
5550t=K55+50245……………(ii)
Dividing Eq. (i) by Eq. (ii), we get, t = 50


NEW

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

Talk to our academic expert!

+91

Are you a Sri Chaitanya student?


ctaimg

Create Your Own Test
Your Topic, Your Difficulty, Your Pace


Similar Questions

A liquid cools down from 70°C to 60°C in 5 minutes. The time taken to cool it from 60°C to 50°C will be

Get your all doubts cleared from
Sri Chaitanya experts

counselling
india
+91

phone iconwhats app icon