With the help of Riemannian geometry, Einstein formulated a geometric description of gravity in which Minkowski's spacetime is replaced by distorted, curved spacetime, just as curved surfaces are a generalization of ordinary plane surfaces . "'Embedding Diagrams "'are used to illustrate curved spacetime in educational contexts.
42.
You can probably tell that I am a newbie where planing and jointing are concerned _ I understand that jointers are used to true edges and for planing surfaces, but I don't know the distinction between when you'd do your surfaces with a planer vs . the jointer.
43.
For if we measure the distance from the soles of the feet to the top of the head, and then apply that measure to the outstretched arms, the breadth will be found to be the same as the height, as in the case of plane surfaces which are perfectly square . }}
44.
Two more flights were made that day and a further three flights proved the need for changes to the tail framework and tail surfaces; large diameter metal tubes replacing the upper booms and fixed fins fitted between the boom ends, as well as reducing the area of the central rudder and improving the planing surface shape.
45.
These claims covered most of the important aspects of the invention ( differential speed, plane surfaces at fixed distance to optimally crack the berry, crossed grooves ), but was not sufficient to protect all he had done, so subsequently, Stevens applied for several other additional patents, to cover the aspect of continuous reduction ( re-crushing of the bran ) and separation.
46.
Hand planes are generally the combination of a cutting edge, such as a sharpened metal plate, attached to a firm body, that when moved over a wood surface, take up relatively uniform shavings, by nature of the body riding on the'high spots'in the wood, and also by providing a relatively constant angle to the cutting edge, render the planed surface very smooth.
47.
Then it " attracted a great deal of attention . . . because of the systematic approach to volumetric integration developed under the name " ductus plani in planum " . " The construction of solids by means of two plane surfaces standing in the same ground line " is the method " ductus in planum " and is developed in Book VII of " Opus Geometricum"
