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first of all, human body temperature is maintained by the body. If it is lower, body will burn some fat to keep it up. If it is high, the body will do something like sweating. Wearing a wet cloth in wind can remove the heat from the body. The amount of heat may be calculated. 1. convection heat transfer by wind between water (a thin layer) to air 2. mass ...


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I would like to add to @Lubos Motl's answer that when you put your feet on wood due to its low conductivity your feet makes the upper layer of the wood warmer whereas other part of wood remain at low temperature, whereas in the case of glass, or metals due to their larger conductivity, the heat given by your feet is conducted to larger part of the material ...


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Materials at the same temperature "feel" differently warm because of their different heat conductivity. The higher the conductivity is, the faster the material drives the heat away from your skin, and the faster it moves the temperature of your skin towards the surrounding temperature (which is lower than your body temperature, at least in a typical winter ...


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Turbine is a device with steady flow process and it has one inlet and one exit. First law of thermodynamics for a steady flow process with one inlet and one exit is as below $$q-w=(h_e-h_i)+\frac 12\left(V_e^2-V_i^2\right)+g(z_e-z_i)\;\tag 1$$ Potential energy change is negligible for this device. Usually, kinetic energy change isn't negligible but it seems ...


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Because both heat and electricity are mediated by the same particles: Electrons! Conductors usually can be modeled by thinking of electrons as if they're free... flying inside the material. This is called the Free Electron Model. Hence they can travel from one end to the other easily. Electricity is transferred when the electrons face an electric field. ...



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