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Hot and Cold Hands Model
By Tracy Mastenbrook
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Last updated about 6 years ago
6 questions
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Click
here
to watch a video of a hot and cold hands demonstration. Then answer the questions that follow.
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
1. Add arrows to the model below to show the flow of thermal energy into/out of the hot and cold hands.
2. The system boundary is the edge of the hands. Use the typing tool to list the inputs and outputs for the hot hand system and the cold hand system.
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View drawing
Question 6
6.
Describe how energy flows between the
room temperature water
and the
cold hand
at the molecular level.
How will the amount of thermal energy change for the
hot
hand when placed in the room temperature water?
The thermal energy of the hot hand will increase.
The thermal energy of the hot hand will stay the same.
The thermal energy of the hot hand will decrease.
How will the temperature change for the
hot
hand when placed in the room temperature water?
The temperature of the hot hand will increase.
The temperature of the hot hand will stay the same.
The temperature of the hot hand will decrease.
How will the amount of thermal energy change for the
cold
hand when placed in the room temperature water?
The thermal energy of the cold hand will increase.
The thermal energy of the cold hand will stay the same.
The thermal energy of the cold hand will decrease.
How will the temperature change for the
cold
hand when placed in the room temperature water?
The temperature of the cold hand will increase.
The temperature of the cold hand will stay the same.
The temperature of the cold hand will decrease.