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A polytropic process is a thermodynamic process that obeys the relation: = where p is the pressure , V is volume , n is the polytropic index , and C is a constant. The polytropic process equation describes expansion and compression processes which include heat transfer.
The normalized density as a function of scale length for a wide range of polytropic indices. In astrophysics, a polytrope refers to a solution of the Lane–Emden equation in which the pressure depends upon the density in the form = (+) / = + /, where P is pressure, ρ is density and K is a constant of proportionality. [1]
A polytropic process, in particular, causes changes to the system so that the quantity is constant (where is pressure, is volume, and is the polytropic index, a constant). Note that for specific polytropic indexes, a polytropic process will be equivalent to a constant-property process.
By comparing the three internally reversible processes compressing an ideal gas from to , the results show that isentropic compression (=) requires the most work in and the isothermal compression(= or =) requires the least amount of work in. For the polytropic process (=) work decreases as the exponent, n, decreases, by increasing the heat ...
An isentropic process is customarily defined as an idealized quasi-static reversible adiabatic process, of transfer of energy as work. Otherwise, for a constant-entropy process, if work is done irreversibly, heat transfer is necessary, so that the process is not adiabatic, and an accurate artificial control mechanism is necessary; such is ...
How does Ozempic work? Well, semaglutide is a glucagon-like peptide 1 (GLP-1) receptor agonist. It mimics the GLP-1 hormone, which is made in the intestinal tract when you eat.
On the other hand, if the expansion is prevented – for example, by a sufficiently rigid enclosure or by increasing the external pressure to counteract the internal one – no work is generated, and the heat energy that would have gone into it must instead contribute to the internal energy of the sample, including raising its temperature by an ...
In the refinement process of sugarcane, you get sugar crystals and molasses, a bitter but flavorful by-product. ... While they can work, they are also another single-use gadget cluttering up the ...