Thermal Expansion

Expansion

increase in size, temperature, length or density

coefficient

constant term related to the properties of a number

Thermal Expansion

defines the tendency of an object to change its dimension either in length, density, area, or volume; most solids and liquid expand when heated and contracted when cooled

Linear Expansion; Volumetric Expansion

types of expansion

Linear Expansion

defined as the increase in the length of the solid to heat

3.0054 cm

A brass strip is 3 cm long at 0C. How long will it be at 100C if the coefficient of linear expansion for brass is 1.8x10^-5/C?

100 cm

An iron rod heated from 30C to 80C. The final length of iron is 115cm and the coeffcent of linear expansion is 3x10^-3/C. What is the original length and the change in length of the iron?

Volumetric Expansion

The volume of a gas, solid, or liquid changes if the temperature, the pressure of the forces acting on that gas/solid/liquid change.

0.33 galloon

Suppose that a gas tank in your car is filled when the temperature is 17C. How many galloons will spill out of 20 galloons steel tank when the temperature rises to 35C?

heat flow

the flow of heat from warmer to cooler surface

heat transfer

the transfer of heat or exchange of thermal energy between physical systems.

conduction, convection, radiation

What are the three methods of heat transfer?