Do Heated Objects Affect Time and Temperature Perceptions?

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SUMMARY

The discussion centers on the misconceptions surrounding heat, temperature, and material properties, specifically addressing several true or false statements related to thermal dynamics. Key conclusions include that cold objects do radiate heat energy, the behavior of bimetallic strips when heated, and the incorrect assumptions about temperature scales. The participants emphasize that temperature is a measure of molecular energy and that heat addition does not always result in a temperature rise in isolated systems.

PREREQUISITES
  • Understanding of thermal dynamics and heat transfer principles
  • Familiarity with temperature scales, specifically Celsius and Fahrenheit
  • Knowledge of material properties, particularly thermal expansion of metals
  • Basic concepts of isolated systems in thermodynamics
NEXT STEPS
  • Research the principles of thermal expansion in metals, focusing on copper and brass
  • Study the differences between Celsius and Fahrenheit temperature scales
  • Explore the concept of isolated systems in thermodynamics and their implications
  • Learn about the behavior of pendulums and the effects of length and mass on swing time
USEFUL FOR

Students studying physics, educators teaching thermal dynamics, and anyone interested in the properties of materials and temperature behavior.

sheri1987
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Homework Statement



Answer True or False?

When the pendulum of a grandfather clock is heated, the clock runs more slowly. FALSE

Cold objects do not radiate heat energy. TRUE

In a bimetallic strip of brass and copper which curls when heated, the brass is on the inside of the curve. TRUE

A copper plate has a hole cut in its center. When the plate is heated, the hole gets smaller. FALSE

When the Celsius temperature doubles, the Fahrenheit temperature doubles. FALSE

When heat is added to a system, the temperature must rise. FALSE


Homework Equations





The Attempt at a Solution



I thought the answer was false, true, true, false, false, false...but it isn't right. Any suggestions?
 
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A longer pendulum takes longer to swing. Imagine how long a 100m cable hanging from a crane takes compared to a clock pendulum.

Objects at absolute zero don't emit heat. How cold does cold mean?

Expansivity Copper 16.5 (m/m.K x 10-6) Brass 18.7 (m/m.K x 10-6)
Which one expands more, which side of a curve gets longer?

Do metals expand or contract when heated?

Correct - celsius and Fahrenheit don't have the same zero point.

If it is an isolated system so that heat can't escape.
Temperature is a measure of the average energy of the molecules, so if heat is added what happens to the energy?
 
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