NCERT Solution for Class 9 Science Chapter 1
Matter in Our Surroundings
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-10
Questions No-4
Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
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When it comes to drinking hot tea or milk, sipping from a saucer is a quicker option than using a cup. This is because the saucer’s larger surface area and superior cooling capabilities play a major role. The design of the saucer allows hot liquid to spread out thinly, exponentially increasing its exposure to the surrounding air. This results in faster heat dissipation and a quicker cooling process. The saucer’s efficient heat distribution helps lower the overall temperature of the liquid, making it drinkable much sooner than if it were confined in a smaller cup. Additionally, the act of sipping from a saucer also allows for smaller, more manageable sips as the liquid is spread out and cools more rapidly.
Tea in a saucer has larger surface area than in a cup. The rate of evaporation is faster with increased surface area. The cooling of tea in saucer takes place sooner than in a cup. Hence we are able to sip hot tea or milk faster from a saucer rather than a cup.
A liquid has a larger surface area in a saucer than in a cup. Thus, it evaporates faster and cools faster in a saucer than in a cup. For this reason, we are able to sip hot tea or milk faster from a saucer than a cup.
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