OBJECT: To investigate the effect upon the period of a vibrating system caused by varying its mass, and to make a determination of the mass of a body by a dynamical method.
METHOD: An elastic system is so arranged that its mass can be varied. The period is observed for a number of (known) masses and a curve is plotted of the mass versus the square of the period. A body of unknown mass is then added and its mass determined from observations of the period. This dynamically determined mass is then compared with the corresponding mass obtained by weighing.
Continue reading ‘Dynamical Comparison of Masses’
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OBJECT: To determine from the dimensions and the mass of a: cylinder the density of the material of which the cylinder is composed.
METHOD: Using a micrometer caliper, a number of observations are made of the diameter and of the height of a cylinder. From the average value obtained for each of these dimensions the volume of the cylinder is computed. The mass of the cylinder is determined by weighing it on a balance. The ratio of the mass of the cylinder to its volume is the density of the material.
Continue reading ‘Density of a Solid’
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