Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

Answer

A hot cup of tea or milk gets cooler due to evaporation. 

 

We know that evaporation depends upon the surface area. 

The more surface area , the faster is the rate of evaporation. 

Since the surface area is more when tea/milk is in the saucer as compared to that when tea/milk is in the cup, the rate of evaporation is faster in a saucer. 

Hence, we are able to sip hot tea or milk faster from a saucer rather than a cup.

Rate of evaporation is higher when surface area-Teachoo-01.jpg

 

  1. Class 9
  2. Chapter 1 Class 9 - Matter In Our Surroundings

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo