Multiple choice general knowledge science & technology

Suppose in a restaurant your coffee is served about 5 or 10 minutes before you ask for it. In order that it should be as hot as possible when you drink it, should you pour in the room temperature cream right away or when you are ready to drink the coffee?

  1. Pour the cream in right away.

  2. Pour the cream when you are ready to drink the coffee.

  3. Both will be same!

  4. Don't pour cream at all!
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Newton's law of cooling, heat loss rate is proportional to temperature difference. Adding cream sooner reduces the coffee's temperature earlier, creating a smaller temperature difference with surroundings and slower heat loss thereafter, resulting in hotter coffee at drinking time.

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