ForsideBøgerPocketbook of Useful Form…and Mechanical Engineers

Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

Forfatter: Guilford L. Molesworth

Sider: 744

UDK: 600 (093)

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Side af 764 Forrige Næste
391 OF ENGINEERING FORMULÆ. Centre of Percussion and Oscillation. I = Moment of inertia. d - Distance of the centre of gravity from the axis of motion. M = Volume of body. x — Distance of centre of oscillation or percus- sion from the axis. I a; — i M d . __ Distance from centre of motion in a straight bar suspended at extremity, f length. Very slender cones suspended at apex, | height. Pendulvm. L = Length of pendulum in feet. I = ,, ,, in inches. T = Time of one oscillation in seconds. N = Number of oscillations per minute. g = Gravity. (Approximately = 32’2 if feet, or 386-4 if inches be required.) 7T = 3-14159. t = -io = tt y/'— 9 T = -554 VL. /Tv /375-36y ,T 375-36 N =-----• JI I— 39'1383 inches in the latitude of London.