Popular Scientific LecturesOpen Court, 1895 - 313 Seiten |
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75 cents acquired appear aẞy body centimetre centre charge chiodo civilisation classical Cloth conception conductor connexion consonance and dissonance deflexion discharge disk distance earth electrical conductor electrostatic unit elements equal equilibrium example excluded perpetual motion exist experience fact familiar figures force Galileo Greek hand ical ideas imagine inquirer jar F Joule language Latin Latin language lectures liquid look mathematics matter Max Müller means measure mechanical method metres mind mirror musical object observation octave PAUL CARUS perpetual motion phenomena philologists physical physicist piano plane position potential principle of energy produced PROF province quantity of electricity quantity of heat question reflexion scientific sensation sense simple sound sphere Stevinus strike string substance symmetry temperature theory things thought tion to-day tone transformed tricity ture velocity of light vibration weight wire
Beliebte Passagen
Seite 226 - directly as the mass, and inversely as the square of the distance.
Seite 144 - DC segante a squadra il perpendicolo AB, il quale sia lontano dalla parete due dita in circa trasferendo poi il filo AB colla palla in...
Seite 146 - ... the line CD. But when the nail is placed so low that the remainder of the thread below it will not reach to the height CD (which would happen if the nail were placed nearer B than to the intersection of AB with the horizontal CD), then the thread leaps over the nail and twists itself about it.
Seite 148 - Horologium de centra oscillationis we read : ' ' If any number of weights be set in motion by the force of gravity, the common centre of gravity of the weights as a whole cannot possibly rise higher than the place which it occupied when the motion began. "That this hypothesis of ours may arouse no scruples, we will state that it simply imports, what no one has ever denied, that heavy bodies do not move upwards. — And truly if the devisers of the new machines who make such futile attempts to construct...
Seite 193 - Vienna, 1873. involves description, that is, a mimetic reproduction of facts in thought, the object of which is to replace and save the trouble of new experience.
Seite 209 - Let us look at the matter without bias. The world consists of colors, sounds, temperatures, pressures, spaces, times, and so forth, which now we shall not call sensations, nor phenomena, because in either term an arbitrary, one-sided theory is embodied, but simply elements. The fixing of the flux of these elements, whether mediately or immediately, is the real object of physical research.
Seite 175 - In all cases, heat is only partially transformed into work, but frequently work is wholly transformed into heat. Hence, a tendency exists towards a diminution of the mechanical energy and towards an increase of the thermal energy of the world.