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Thermal expansion is the change in the size of an object or structure due to the increase in atomic bond lengths at higher temperatures. That's what it comes down to. A steel railroad rail is set with a small gap between it and the next rail so linear expansion won't cause the rails to push against each other and the track to buckle. Large skyscrapers have their exterior skins engineered so that thermal expansion won't cause the aluminum, steel or other trim to buckle and pull away from the structure. Keep in mind that this is a 3D problem and not just a 2-dimensional one (though in the case of the rails, the third dimension isn't nearly as important. We are talking about a thermodynamic property of materials. The coefficient of thermal expansion is a measure of that change in length or volume of a material as a function of temperature. It's just that simple. As objects get warmer, their size increases by "x" amount. And this may not be linear, too. At higher temperatures, there may not be as much of an increase in the "size" of an object for another identical change in temperature. There are some measurements and some calculations that must be made to come up with the numbers. More information can be found by using the link below to the Wikipedia article on the coefficient of thermal expansion.
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∙ 15y ago
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∙ 16y agoThe cubic thermal expansion of water is: T [deg C] coefficient [1/deg C] 20 0.206e-3 25 0.256e-3 30 0.302e-3 Source: CRC handbook of chemistry and physics
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∙ 9y agoThe coefficient of superficial expansion refers to the ratio of change in area to an increase in its temperature. It measures the expansion of a Laminar surface.
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∙ 11y agoIt is a factor that tells for an individula substance --- like a metal railroad rail, how much it expands for each degree of temp. increase.
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∙ 14y agoThe extension of a bar per degree rise in temperature per unit of original length
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∙ 10y agoThat means how much the volume of something will expand, usually as a result of a temperature change.
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What is coefficient of superficial expansion?
The coefficient of superficial expansion refers to the ratio of change in area to an increase in its temperature. It measures the expansion of a Laminar surface.
What is superficial expansion?
Superficial expansion is the increase in surface area of 1 meter square area of a solid for rise of temperature, 1kelvin is called the coefficient of surface expansion of material of that solid.
A material has a coefficient of volume expansion of 60×10^-6/degree celsius. What is its coefficient of expansion?
120×10^-6
Why liquids have two coefficient of expansion?
Because liquids have two types of expansions i.e Apparent Expansion and Real Expansion
Why is it necessary to know the coefficient of linear expansion of solids?
By knowing the coefficient of linear expansion of solids, you can determine how a solid reacts to temperature. Everything reacts to thermal expansion. For instance, a concrete bridge expands when hot, and with the formula for expansion and the coefficient for it, you know just how much that concrete expands and you can plan and build accordingly. That saves lives.
What is coefficient of superficial expansion?
The coefficient of superficial expansion refers to the ratio of change in area to an increase in its temperature. It measures the expansion of a Laminar surface.
What is superficial expansion?
Superficial expansion is the increase in surface area of 1 meter square area of a solid for rise of temperature, 1kelvin is called the coefficient of surface expansion of material of that solid.
What is the cubical coefficient of thermal expansion for metals?
Since most metals are isotropic, the cubical coefficient of expansion is three times the linear coefficient of expansion. The linear coefficient of expansion is obtained from measurement and tables for the specific material which are readily available.
Why aluminum has high thermal expansion coefficient than Copper?
Why aluminium has high thermal expansion coefficient than Copper?"
What is the coefficient of expansion of brass?
.000019
What is a binomial coefficient?
A binomial coefficient is a coefficient of any of the terms in the expansion of the binomial (x+y)^n.
What is the coefficient of the x2y term in the expansion of (x 2y)3?
The coefficient is 6.
Does the coefficient of linear expansion depends upon length?
yes,according to relation coefficient of linear expansion depends upon original length.
What is the coefficient of the x2y term in the expansion of (x plus 2y)3?
The coefficient is 6.
What is the thermal expansion coefficient for brick?
0.0000055
A material has a coefficient of volume expansion of 60×10^-6/degree celsius. What is its coefficient of expansion?
120×10^-6
Why liquids have two coefficient of expansion?
Because liquids have two types of expansions i.e Apparent Expansion and Real Expansion
