Comentarios de la gente - Escribir un comentario
No encontramos ningún comentario en los lugares habituales.
Otras ediciones - Ver todas
amperes angle apparatus armature axis ball battery block body called carbon cell center of mass centimeter circuit coil colors conductor connected convex lens copper wire cork cylinder density determine diameter difference direction disk distance draw dynamo edge elastic electric electrification electromotive force electroscope energy equal ether waves Experiment feet flame Florence flask focus galvanometer galvanoscope glass tube heat horizontal hydrometer inches iron lamp length lens lever Leyden jar light lines of force liquid magnetic mass measure mercury metal meter mirror molecules motion move needle notice ohms oscillation paper parallel pass pendulum piece plane plate position potential pounds pressure prism produced radiant energy radiation rays reflected refraction represent resistance screen shown in Fig sound spectrum square string strip substance surface suspended temperature thermometer tion tone tumbler unit velocity vertical vessel vibrations voltaic cell volts wave-length waves weight zinc
Página 165 - Principle states that a body wholly or partially immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by it.
Página 96 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Página 302 - ... to that required to raise the temperature of the same weight of water one degree from the temperature of maximum density 39.1 is commonly called the specific heat of the substance.
Página 167 - The specific gravity of a substance is the ratio between the weight of any volume of the substance and...
Página 205 - E ; each boy, after the transmission ot the push, becoming himself erect. E, having nobody in front, is thrown forward. Had he been standing on the edge of a precipice, he would have fallen over; had he stood in contact with a window, he would have broken the glass ; had he been close to a drum-head, he would have shaken the drum.
Página 5 - ... laboratory as it is in the ordinary recitation or lecture room. The great utility of the laboratory note-book is emphatically stated. To the objection that the kind of instruction described requires much time and effort on the part of the teacher, the Conference reply that to give good instruction in the sciences requires of the teacher more work than to give good instruction in mathematics or the languages ; and that the sooner this fact is recognized by those who have the management of schools...
Página 312 - We have now to try and realize the idea of ' a perfectly continuous, subtle, incompressible substance pervading all space and penetrating between the molecules of all ordinary matter, which are embedded in it, and connected with one another by its means.
Página 152 - The pressure per unit of area exerted anywhere upon a mass of liquid is transmitted undiminished in all directions, and acts with the same force upon all surfaces, in a direction at right angles to those surfaces.