A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 415
re of the water must also be found by means ofa pressure-gauge connected with the supply pipe (seeFig. 187). The gauge should be as nearly as possi-ble on a level with the outlet by which water escapesfrom the motor. The pressure must be reduced todynes (or megadynes) per square centimetre. If v… … Fig. 188. is vP ergs per second (see § 118). If ^ is the valueof this pressure when reduced to megadynes persquare centimetre,^ then the work spent on themachine is vp megergs per second. (3) For the accurate determination of efficiency,it is desirable to make simultaneous determinations ofthe…
Physics
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