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Mini-Quiz: Heat Transfer with Hot Coffee

by Ron Kurtus (3 April 2008)

Take this Mini-Quiz to check your understanding of the lesson material.

1. How does the paper cup get heated by the hot coffee?

They usually put the cup in an oven to heat it up before serving the coffee

The hot liquid in contact with the cup heats it by conduction

Paper reacts with coffee causing it to heat and sometimes even start on fire

2. Does heat get transferred through the cardboard holder?

Some heat is transferred but usually not enough to burn your fingers

No heat gets through and the holder even feels somewhat cool

All of the heat is transferred, but you do not notice it once you start drinking the coffee

3. Why does the lid have a hole in it?

So you can peek inside the cup to see if there is any more coffee left

So that the cup doesn't explode from all the pressure inside

To allow you to drink the coffee in situations where you might spill it

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

Savor the aroma of life

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