A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 692
lculated from 9 >^Hf LII THE CHRONOGRAPH G67 In this time the number of vibrations n made by the fork can be counted, then n Frequency of fork = 7——•t2 — li In the given case n--21 and sx = l-54 cm., s2=9-27 cm.; .. taking g as 981 cm. per sec. per sec. t2 - ti = 0-1375 - 0-0561 =0-0814 sec.; 21… … Fig. 613.—The chronograph. an axle S, on which a screw thread of large pitch is cut. On rotatingthe drum by means of the handle, it advances as it rotates. Thefork is provided with a style, so that it leaves a trace when thedrum turns. In order to mark intervals of time, a small electro-magnet M is…
Physics
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