Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 212
s are heated by a process of circulation amongsttheir particles, called convection, the heat being applied frombelow, as shown in Fig. 143. When the particles at thebottom become heated, they expand, and as they are thenlighter than the cooler particles above them, they rise to the Explain his… … top of the vessel to give place to the heavier and cooler ones that supply their places. In this way a double current of particles is set up, as shown in the figure by the arrows, the hot ones rising and the cool ones descending. This process of circulation goes on till a uniform temperature is…
Physics
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