Situation 2

Study the line graph below.

 



Are you able to tell me what exactly happen at the 5 different points of time?

Your answers should look like these:
1)
2)
3)
4)
5)

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Situation 1 (Discussion Closed)

John did the following experiment.

He dipped his hand into a beaker of ice water for a minute before dipping it into another beaker of water at room temperature. He then commented that his hand in the beaker with the water at room temperature felt very warm and comfortable.

Peter who happened to be around then dipped his hand into the same beaker of water at room temperature. However, he claimed that his hand felt cold.

Can you explain the difference in their experiences?

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You will need to:
1) provide at least one comment of your own and
2) provide comments on at least another two of your friends' comments.

All comments are to be meaningful and serve to build more knowledge among your peers and yourself. Have Fun!

Mr Ang

Explanation:

As the temperature of John's hand was higher than the ice water, his hand lost heat to it. Hence, his hand would feel cold.  His hand would then be of a lower temperature as compared to the water in the other beaker at the room temperature. His hand therefore gained heat. This explains why he felt warm.

Peter, on the other hand, felt cold as he lost heat to the water at the room temperature. The temperature of his hand is probably higher than the room temperature.

Scientific Principle:
Heat travels from a hotter object to a colder object until both have the same temperature.

Common misconception:

• gains coldness (wrong) should be lost heat

This discussion is officially closed.