Heat & Friction: How to Tell When Temperature Changes

[James81118]

Homework Statement

Rub the two books together for a long time, so that the thermometer goes all the way up to the top and all the extra molecules fly off the top book. Keep the books touching, but stop rubbing. The temperature will go down. How can you tell? List two different ways.

Homework Equations

The Attempt at a Solution

 

[Isaac0427]

I have no idea what the question is. Would you mind elaborating?

 

[James81118]

when you rub two objects together heat is generated and when you stop heat is lost. what is the reason for this?

 

[James81118]

I have no idea what the question is. Would you mind elaborating?

when you rub two objects together heat is generated and when you stop heat is lost. what is the reason for this?

 

[billy_joule]

What do you think? What research have you done?

Are you familiar with the law of conservation of energy? What about Newton law of cooling?