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To the best of my understanding different metals have different conducting properties at different temperatures. Copper at 100 deg F will conduct electricity differently than
gold or silver at the same temperature. This in in addition to the fact that a copper bar at 200 degrees below zero will be a better conductor than the same copper wire at 100 deg F. A few degrees above absolute zero (-459.67 F) many substances lose all resistance to electrical current completely and become superconductive. The exact temperature that this happens is depends on the substance.
An easy read that talks about this stuff is An Intelligent Man's Guide to Science by Isaac Asimov.
What else can I help you with?
What is a liquid metal that expands and contracts as the temperature changes and is the metal used in thermometers called?
The liquid metal used in thermometers that expands and contracts as temperature changes is mercury. Mercury is commonly used due to its unique properties, such as its wide liquid temperature range and high thermal conductivity, making it ideal for accurate temperature measurement.
If mercury is a liquid at room temperature than why is it a metal?
There is nothing that says a metal has to be a solid at room temperature. Mercury exhibits pretty much all of the properties one would expect from a metal (shine/luster, reactivity, electrical conductivity, etc.) which are manifestations of its position in the periodic table.
On what does conductivity in a metallic wire depend?
Conductivity in a metallic wire depends on factors such as the type of metal, its purity, temperature, and the presence of impurities. Metals with higher electron mobility and lower resistance exhibit higher conductivity. Additionally, increasing the cross-sectional area of the wire can also enhance conductivity.
Is metal a thermal conductivity?
Yes, metal will conduct heat energy
Is an electroplated metal more conductive?
Not necessarily. The conductivity depends on what metal it is and how pure it is.
How does the conductivity of metal change with temperature?
The conductivity of metal generally increases with temperature. This is because as temperature rises, the atoms in the metal vibrate more vigorously, allowing electrons to move more freely and carry electrical charge more effectively.
Do metals increase electrical conductivity with increasing temperature?
Yes, metals generally demonstrate an increase in electrical conductivity as temperature rises. This phenomenon is attributed to the greater mobility of electrons at higher temperatures, allowing them to move more freely through the metal lattice and thus enhance conductivity.
What are the three factors that will affect conduction in a metal?
Conductivity of the metal [constant for the metal] Area to heat flow Length of the rod Temperature differece between heat flowing points.
Which metal feel coldest at same room temperature?
Metals seem cooler to the touch because our perception of the temperature is governed by both the actual temperature, as well as the thermal conductivity of the metal. And if the metal also has a high thermal capacity, this feature will delay the metal from approaching the real temperature.The temperature we are sensing is of course how close to body temperature the metal is.As to which metal, the combination of thermal conductivity and thermal capacity will feel coldest. Probably silver or copper.
What metal has lowest thermal conductivity?
Mercury, apparently Bismuth has the lowest thermal condctivity of metals that are solid at room temperature.
Why does the electrical conductivity of pure metal decrease with temperature while that of semiconductors increases?
The conductivity depends on the passage of charged particles especially electrons. In metals electrons are easily available in conduction band and so its conductivity is high. As we increase the temperature then core of atoms vibrate largely. So with positive charge it could easily minimize the electrons in the conduction band and hence fall in conductivity In case of semiconductor there will be usually forbidden gap between valence band and conduction band. So conduction is poor at ordinary temperature. But as we increase temperature that would allow electrons to reach conduction band as covalent bonds get broken. Hence higher conductivity
What would increase the amount of heat the metal radiates to the air?
Increasing the temperature of the metal, increasing the surface area of the metal, and improving the thermal conductivity of the metal would all increase the amount of heat the metal radiates to the air.
How can 2 objects that are the same temperature feel as if they are different temps?
The difference may be due to different conductivity. For example, if you touch hot metal, heat flows from the metal to your fingers. Because of the metal's good conductivity, more heat will quickly replenish the heat the metal has lost - the heat will flow quickly to your fingers. Do the same with glass (a bad conductor), and only a small amount of heat will flow. The glass in contact with your skin will quickly have the same temperature as your skin.
What causes low conductivity.... metal plus metal or non-metal plus non-metal or metal plus non-metal?
well, not metal+metal, but for the other 2 you'd have to specify, because water+metal=good conductivity & just water or another liquid = good conductivity. now stone, it is a horrible conductor.
Is metal low conductivity?
No, metals have high conductivity but has low resistivity.
What is the relationship between temperature and air conductivity?
The relationship between temperature and air conductivity is that as temperature increases, air conductivity also increases. This means that higher temperatures can lead to better conductivity of electricity through the air.
What is the skin depth of gold and how does it affect the conductivity of the metal?
The skin depth of gold is about 52 nanometers at room temperature. This means that electromagnetic waves penetrate only up to this depth into the metal. The skin depth affects the conductivity of gold by limiting the depth at which current can flow, leading to higher conductivity for gold compared to other metals.
