. A text book of physics, for the use of students of science and engineering . FlO. 368.—Section of Boyss calorimeter fortesting the heating value of gas. 364 HEAT CHAP. bomb is then lowered carefully into a vessel K containing a measuredquantity of water and fitted with stirrers L which are rotated byhand. The temperature is observed by means of a delicate thermo-meter T. Another vessel M surrounds K, the space between forming. Fig. 369.—Section of a bomb calorimeter. an air jacket; the vessel N surrounds M, and the space between ischarged with water ; a flannel jacket is wrapped round the ou
. A text book of physics, for the use of students of science and engineering . FlO. 368.—Section of Boyss calorimeter fortesting the heating value of gas. 364 HEAT CHAP. bomb is then lowered carefully into a vessel K containing a measuredquantity of water and fitted with stirrers L which are rotated byhand. The temperature is observed by means of a delicate thermo-meter T. Another vessel M surrounds K, the space between forming. Fig. 369.—Section of a bomb calorimeter. an air jacket; the vessel N surrounds M, and the space between ischarged with water ; a flannel jacket is wrapped round the outsideof N. After ignition, the stirrers are operated until the temperatureceases to rise. The heating value of the fuel is then calculated inthe same manner as in the Darling calorimeter (p. 362). Exercises on Chapter XXVII. 1. Find the mechanical energy given out when one horse-power ismaintained for one hour. Find the heat equivalent of this energy. Statethe result in , and calories. 2. Give a brief account of the evidence that we bave for the statementthat heat is a form of energy. 3. A tank contains 4 gallons of water, and is fitted witb a stirringarrangemenl which takes o-2S horse-power to drive it. Supposing thatall the work done is converted into heat and retained by the water, howlong will it take to raise the temperature of the water from 15° to 25° C. ? xxvii EXERCISES 365 4. A t
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