Laboratory exercises to accompany Carhart and Chute's First principles of physics . he mercury at (7, so that thevolume, (7Z), of inclosed air will be at atmospheric necessary elevation may be obtained by the use of asmall piece of glass tubing ((7, Fig. 73). Measure the distance from O to JS, the nearer end of therubber connection, and record in the table of observationsnear the top of the left-hand page. (5) Remove the air tube with its stopper from the icetray, and fit it into the steam jacket (Fig. 74) so that thedistance BO is just the same as with the ice tray. INCREASE IN P
Laboratory exercises to accompany Carhart and Chute's First principles of physics . he mercury at (7, so that thevolume, (7Z), of inclosed air will be at atmospheric necessary elevation may be obtained by the use of asmall piece of glass tubing ((7, Fig. 73). Measure the distance from O to JS, the nearer end of therubber connection, and record in the table of observationsnear the top of the left-hand page. (5) Remove the air tube with its stopper from the icetray, and fit it into the steam jacket (Fig. 74) so that thedistance BO is just the same as with the ice tray. INCREASE IN PRESSURE AT CONSTANT VOLUME 203 Support the outer end of the air tube in a movableclamp on a vertical support. As the air in the tubeexpands, keep raising the level of the outer tube (AB,Fig. 74), so that the inner end of the mercury columnextends just to G. By this means the volume of theinclosed air is kept the same as the volume of the airwhich was measured at 0°C. In order to keep this volume of air constant, it has beennecessary to increase the pressure upon it by raising a. Fig. 74. portion of the mercury column. The increase in pressure,in millimeters of mercury, is the difference between theheight of the outer and the inner ends of the mercurycolumn. Determine these vertical distances above thetable top and record them in the table. Also read thebarometer and record the reading. Observations Part (a) Temperature 0° C. (melting ice) Length BC mm. Pressure of inclosed air (Barometer reading) mm. Part (b) Barometer reading mm. Height of outer end of mercury above table top mm. Height of inner end of mercury above table top mm. 204 LABORATORY EXERCISES Make simple drawings, showing the arrangement of theair tube at each of the two temperatures. Briefly describethe experimental method, with particular reference to themeans of keeping the volume constant. Calculate the boiling point of water (temperature ofsteam) at the observed barometric pressure. This is doneby adding to
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysics, bookyear1913
