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Let us catch up right from the basics
Heat in joule with dimension M L^2 T^-2 passing through a conductor is directly proportional to
a) area of cross section [L^2]
b) time [T]
c) temperature gradient [KL^-1]
So we can write using a constant K
Hence H = K * [(@2 -@1) / L ]* A * t
So dimensions for K will be M L T^-3 K^-1
The dimension of thermal conductivity is typically measured in units of watts per meter per Kelvin (W/mK) or calories per second per centimeter per Celsius (cal/s cm °C).
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What is the thermal conductivity coefficient of porcelain?
The thermal conductivity coefficient of porcelain is typically around 1-2 W/mK. This means that porcelain is a relatively poor conductor of heat compared to metals, which have much higher thermal conductivity values.
Does the value of thermal conductivity depend on the dimension of the specimen?
Yes, the value of thermal conductivity can depend on the dimension of the specimen due to factors such as heat transfer pathways and interfacial resistance. For some materials, thermal conductivity can vary with thickness or shape, impacting the overall heat transfer characteristics of the specimen.
What is thermal and electrical conductiuity?
Thermal conductivity is the ability of a material to conduct heat, while electrical conductivity is the ability to conduct electricity. Materials with high thermal conductivity can transfer heat quickly, while those with high electrical conductivity allow electricity to flow easily. Both properties are important in various applications, such as in electronics and thermal management.
What is used to describe how well various substances conduct thermal energy?
thermal conductivity The term for how substances conduct thermal energy is thermal conductivity.
What term is used to describe how well various conduct thermal energy?
thermal conductivity The term for how substances conduct thermal energy is thermal conductivity.
What is the thermal conductivity coefficient of porcelain?
The thermal conductivity coefficient of porcelain is typically around 1-2 W/mK. This means that porcelain is a relatively poor conductor of heat compared to metals, which have much higher thermal conductivity values.
Does the value of thermal conductivity depend on the dimension of the specimen?
Yes, the value of thermal conductivity can depend on the dimension of the specimen due to factors such as heat transfer pathways and interfacial resistance. For some materials, thermal conductivity can vary with thickness or shape, impacting the overall heat transfer characteristics of the specimen.
Why is alocohol used in thermometers?
It has good coefficient of thermal conductivity and expands uniformly and gradually
What are at least 4 thermal properties of uranium?
- thermal conductivity - melting point - boiling point - specific heat capacity - coefficient of thermal expansion - superconductivity at low temperature
Does it make sense to divide thermal conductivity k by the heat transfer coefficient h and expect for most of the units to cancel?
yes
What is the properties of cutting tool material?
Harder than work piece High thermal conductivity High heat transfer coefficient
What is the conductivity of material materials?
Thermal Conductivity is analogous to electrical conductivity. To calculate electrical resistance look-up rho (resistivity). For Copper rho = 1.68�10-8 Ohms-meter Resistance = resistivity (rho) � length/area For thermal conductivity "k" (Watts/m°C) is the coefficient of thermal conduction. Heat transfer (Watts) = k � area/thickness � temperature difference.
Why should the coefficient of thermal expansion of a refractory metal be the lowest?
refractory metals have high melting points and are used in extremely hot environments; if expansion coefficient is lower this prevents high stresses that can develop due to thermal gradients during the high heat up. It helps to have high thermal conductivity as well
Is thermal conductivity a chemical or a physical?
Thermal conductivity is a Physical property
What is osmium thermal conductivity?
Osmium thermal conductivity is 87,4 W/m.K.
Which metal can oppose the temperature?
I do not really understand your question. What do you mean by "oppose the temperature"?If you mean insulate or have a low coefficient of thermal conductivity then there are several alloys which conduct heat less than most other metals. Some stainless steels for example have relatively low thermal conductivity.
What is the thermal and electrical conductivity of Californium?
The thermal conductivity of californium is 1 W/m.K.
