A Text book of the Principles of Physics
A Text book of the Principles of Physics
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In our eReader you can find the full English version of the book. Read A Text book of the Principles of Physics Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Text book of the Principles of Physics
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If the particles all lay in straight lines, the speed of propagation of sound would be the * See Tolver Preston, Phil Mag, iii (1877).
Digitized by VjOOQIC I 430 ON SOUND. [chap.
average speed at which the particles move ; just as the rate of propagation of a message by couriers would be the average rate at which they ride. Nothing would be gained in point of speed by multiplying the number of such couriers if their horses were not susceptible to fatigue ; and so it is a matter of in- differenc...e what the number of molecules is by the intervention of which the exchange and transmission of energy are effected, provided always that the coUisions of the molecules occupy time inappreciable in comparison with the intervals spent by them in traversing their free paths, and further that the size of the molecules be very small in comparison with the average length of the free path. Thus the velocity of sound does not depend, within the same gas, upon the density or on the pressure.
If the speed be changed, the case is different ; an increased average speed causes an increased velocity of propagation.
What to read after A Text book of the Principles of Physics?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Daniell to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
If the particles all lay in straight lines, the speed of propagation of sound would be the * See Tolver Preston, Phil Mag, iii (1877).
Digitized by VjOOQIC I 430 ON SOUND. [chap.
average speed at which the particles move ; just as the rate of propagation of a message by couriers would be the average rate at which they ride. Nothing would be gained in point of speed by multiplying the number of such couriers if their horses were not susceptible to fatigue ; and so it is a matter of in- differenc...e what the number of molecules is by the intervention of which the exchange and transmission of energy are effected, provided always that the coUisions of the molecules occupy time inappreciable in comparison with the intervals spent by them in traversing their free paths, and further that the size of the molecules be very small in comparison with the average length of the free path. Thus the velocity of sound does not depend, within the same gas, upon the density or on the pressure.
If the speed be changed, the case is different ; an increased average speed causes an increased velocity of propagation.
What to read after A Text book of the Principles of Physics?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Daniell to read onlineMoreLess
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