The reason there are cracks in sidewalks instead of just one continuous piece of concrete is to provide for thermal expansion. Without the expansion cracks, as the concrete heats up it expands it would have no where to go so the sidewalk would buckle. Also, in the winter when it gets cold the concrete would shrink and crack/break.
Example sentence - Our homework assignment is to give an example of thermal expansion and explain why it happens.
Chemical reactions and magnetic fields are not examples of thermal expansion. Thermal expansion specifically refers to the increase in size of a material when heated and the decrease in size when cooled.
In a solid, thermal expansion occurs as the temperature increases, causing the atoms or molecules to vibrate more, increasing the average distance between them. As a result, the solid expands in all directions. In a gas, thermal expansion occurs as the temperature increases, causing the gas molecules to move faster and spread out, increasing the volume of the gas.
Two examples of thermal expansion in solids are the expansion of a metal rod when heated, causing it to increase in length, and the expansion of a bridge beam on a hot day, resulting in the beam bending slightly due to the increase in temperature.
The thermal expansion of a solid is caused by an increase in temperature, which leads to the atoms within the solid vibrating more vigorously and occupying a larger volume. As the temperature rises, the atoms move further apart, causing the solid to expand in all directions.
Example sentence - Our homework assignment is to give an example of thermal expansion and explain why it happens.
Chemical reactions and magnetic fields are not examples of thermal expansion. Thermal expansion specifically refers to the increase in size of a material when heated and the decrease in size when cooled.
This is an example of thermal expansion, where the liquid in the thermometer expands as it is heated, causing it to rise within the tube.
In a solid, thermal expansion occurs as the temperature increases, causing the atoms or molecules to vibrate more, increasing the average distance between them. As a result, the solid expands in all directions. In a gas, thermal expansion occurs as the temperature increases, causing the gas molecules to move faster and spread out, increasing the volume of the gas.
a Mercury thermometera mechanical thermostat
Two examples of thermal expansion in solids are the expansion of a metal rod when heated, causing it to increase in length, and the expansion of a bridge beam on a hot day, resulting in the beam bending slightly due to the increase in temperature.
Thermal expansion and contraction, specifically the different coefficients of thermal expansion (CTE) between glass and metal....AND ITS LIKE A (CLOSED SYSTEM)
The thermal expansion of a solid is caused by an increase in temperature, which leads to the atoms within the solid vibrating more vigorously and occupying a larger volume. As the temperature rises, the atoms move further apart, causing the solid to expand in all directions.
A common difficulty caused by thermal expansion is the warping or cracking of materials such as metal or concrete when they are exposed to extreme temperature changes. For example, railroad tracks can buckle in hot weather due to thermal expansion if proper allowances are not made.
false
buckled railroad tracks on a hot day
Not sure what you mean; basically, ANY solid will expand if you heat it.