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Questions and Answers
Which of the following best defines thermal expansion?
Which of the following best defines thermal expansion?
- The contraction of a material due to a decrease in its temperature
- The expansion of a material due to an increase in its pressure
- The contraction of a material due to an increase in its pressure
- The expansion of a material due to an increase in its temperature (correct)
What happens to the particles of a material during thermal expansion?
What happens to the particles of a material during thermal expansion?
- They change their state from solid to liquid
- They lose energy and move less vigorously
- They change their state from liquid to gas
- They gain energy and move more vigorously (correct)
Which of the following factors can affect the degree of thermal expansion in a material?
Which of the following factors can affect the degree of thermal expansion in a material?
- Temperature
- Pressure
- Composition
- All of the above (correct)
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Study Notes
Thermal Expansion
- Thermal expansion is the change in volume or length of a material in response to a change in temperature.
Particle Behavior
- During thermal expansion, the particles of a material gain kinetic energy and start moving more rapidly, causing them to collide more frequently and spread out, resulting in an increase in volume or length.
Factors Affecting Thermal Expansion
- The degree of thermal expansion in a material can be affected by factors such as:
- The material's coefficient of thermal expansion, which varies between materials
- The initial temperature of the material
- The change in temperature of the material
- The material's structure and composition
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