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How to calculate thermal diffusivity and what factors should be considered in the calculation?
To calculate thermal diffusivity, divide the thermal conductivity of a material by its density and specific heat capacity. Factors to consider in the calculation include the material's composition, temperature, and physical state.
What is the difference between thermal diffusivity and thermal conductivity, and how do they affect the heat transfer properties of a material?
Thermal diffusivity measures how quickly heat can spread through a material, while thermal conductivity measures how well a material can conduct heat. A material with high thermal diffusivity can quickly distribute heat, while a material with high thermal conductivity can efficiently transfer heat. Both properties affect how a material responds to changes in temperature and how heat is transferred within it.
What are the thermal parameters?
Thermal parameters are characteristics that describe how heat is transferred in a material or system. These parameters include thermal conductivity, heat capacity, thermal diffusivity, and thermal resistance. They are important in determining how a material or system responds to changes in temperature.
If two bodies are in thermal equilibrium in one frame will they be in thermal equilibrium in all frames?
No, if two bodies are in thermal equilibrium in one frame, they will not necessarily be in thermal equilibrium in all frames. Thermal equilibrium depends on the balance of energy exchange between the bodies, which can vary with different frames of reference due to relative motion and time dilation effects.
Is the mass diffusivity of air in water vapour equal to that of water vapour in air?
No, the mass diffusivity of air in water vapor is different from the mass diffusivity of water vapor in air. The diffusivity of a substance in a medium depends on various factors such as temperature, pressure, and molecular weights of the substances involved, leading to different diffusion rates in different directions.
