Calculating Thermal Expansion and Young's Modulus: A Scientific Inquiry

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In summary, thermal expansion is the increase in volume or size of matter when heated, due to the increase in kinetic energy of particles. There are two types of thermal expansion: linear and volumetric, which are measured in different units. The main factors that affect thermal expansion are the material's composition, temperature change, and original dimensions. Thermal expansion can be measured using a dilatometer or thermomechanical analyzer. It is important in industries such as construction and engineering, as well as in everyday applications such as thermometers and thermostats.
  • #1
ice87
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These are really parts of questions.
http://noether.physics.ubc.ca/physics153/assign22k5.pdf

for number 2, I'm getting 264000kPa, but somehow it just doesn't seem rite, so if you guys can check for me, that'll be great. the other one i don't get is the second part of questions 4 where it asks for a time difference. can anyone help me out here? thanks!
 
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  • #2
*bump* no one?
 
  • #3
Could you post what you used for the various constants?

Thermal expanson of Al =?
youngs modulus of steel =?
 
  • #4
thermal expansion of: Al = 2.4*10^-5, steel: 1.2*10^-5, brass: 2.0*10^-5
young's modulus of steel = 20*10^10 (NOT 2.0*10^10)
 

1. What is thermal expansion?

Thermal expansion is the tendency of matter to increase in volume or size when heated. This is due to the increase in the average kinetic energy of the particles, causing them to move and take up more space.

2. What is the difference between linear and volumetric thermal expansion?

Linear thermal expansion refers to the increase in length of a material when heated, while volumetric thermal expansion refers to the increase in volume of a material when heated. Linear expansion is typically measured in units of length per unit temperature change, while volumetric expansion is measured in units of volume per unit temperature change.

3. What factors affect thermal expansion?

The main factors that affect thermal expansion are the material's composition, temperature change, and the original dimensions of the material. Different materials have different coefficients of thermal expansion, meaning they will expand at different rates when heated. A larger temperature change will also cause a greater expansion. The original dimensions of the material will determine how much it can expand before reaching its limit.

4. How is thermal expansion measured?

Thermal expansion can be measured using a device called a dilatometer, which measures the change in length or volume of a material as it is heated or cooled. Another method is to use a thermomechanical analyzer, which measures the force required to stretch or compress a material as it is heated or cooled.

5. Why is thermal expansion important?

Thermal expansion is important in various industries, such as construction, engineering, and materials science. Understanding how materials expand and contract with temperature changes is crucial for designing structures and products that can withstand these changes without breaking or warping. It is also important in everyday life, such as in the functioning of thermometers and thermostats.

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