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Using A Density Gradient Column To Determine Wheat Density, Wendell R. Peters, Robert Katz
Using A Density Gradient Column To Determine Wheat Density, Wendell R. Peters, Robert Katz
Robert Katz Publications
A wheat kernel placed in a density gradient column will sink until it reaches the level where its average density is equal to that of the liquid at that level. Knowing the density of the liquid as a function of height, one can measure accurately the density of the kernel to three decimal places in about 1 to 2 minutes per kernel. Kernel density ranged from a maximum of 1.416 at 7.5% moisture to a minimum of 1.255 g./cm.3 at 18.5% moisture, for the samples tested. Kernels of a homogeneously selected sample of hard spring wheat (Lee) varied in …
The Magnetic Pole In The Formulation Of Electricity And Magnetism, Robert Katz
The Magnetic Pole In The Formulation Of Electricity And Magnetism, Robert Katz
Robert Katz Publications
The use of the magnetic pole in the development of the concepts of electricity and magnetism leads unambiguously to a relativistic formulation of the field vectors which is well within the grasp of the sophomore student. The development is wholly consistent with Maxwell's equations and leads to clear and understandable definitions of the field vectors both in vacuum and in the material medium, as well as to the relations defining the transformations of the field vectors.