United States or Democratic Republic of the Congo ? Vote for the TOP Country of the Week !
That is to say, according to the oblateness of a rotating spheroid, the detached ring may be either a hoop-shaped ring or a quoit-shaped ring. One further implication must be noted. In a much-flattened or lens-shaped spheroid, the form of the ring will vary with its bulk.
Legitimately assuming that the outermost parts of a rotating nebulous spheroid, in its earlier stages of concentration, must be comparatively rare; and that the increasing density which the whole mass acquires as it contracts, must hold of the outermost parts as well as the rest; it is argued that the rings successively detached will be more and more dense, and will form planets of higher and higher specific gravities.
Sure enough, bending over the basin, I heard a buzz of wheels, and looked up to see the whole machine springing like a score of whipping-tops gone mad, the brass balls swinging and rotating so fast that the eye lost them in little twinkling circles and ellipses, the wheels whirring and filling the room with their hum. My astronomer had dived under the bench.
The number of complete loops, of course, indicated the number of revolutions. A sand-bank makes a good butt to catch them. In rotating, much depends on the size and shape of the feather. Shooting a blunt arrow from a seventy-five pound bow at a white pine board an inch thick, the shaft will often go completely through it. A broad hunting head will penetrate two or three inches, then bind.
The inner room, he perceived, was high, and its ceiling dome shaped', with an oblong aperture in the centre, opening into a funnel in which a wheel of broad vans seemed to be rotating, apparently driving the air up the shaft. The faint humming note of its easy motion was the only clear sound in that quiet place.
Let me illustrate this by a comparison between the earth rotating on its axis and the fly-wheel of an engine: The fly wheel is a sort of reservoir, into which the engine pours its power at each stroke of the piston. The various machines in the mill merely draw off the power from the store accumulated in the fly-wheel.
If the electrolytic apparatus is provided with a mechanism for the rotation of the electrode or stirring of the electrolyte, proceed as follows: Arrange the resistance in the circuit to provide a direct current of about one ampere. Pass this current through the solution to be electrolyzed, and start the rotating mechanism.
Dickie had to stoop to it. Mr. McRittie's arguments were a series of nails that he knocked into the table, and he did it in a workmanlike manner. Mr. Dickie, though he kept firm on his feet, swayed his body until by and by his head was rotating in a large circle. The mathematical figure he made was a cone revolving on its apex.
For producing the energy employed for transmitting the signals a high tension continuous current dynamo is used. An oscillatory current of high potential is produced in a circuit which consists of rapidly rotating disks in connection with the dynamo and suitable condensers.
For this exceptional kind of divining-rod was made of a pointed stick rotating in a block of wood, and it was the presence of hidden water or treasure which was supposed to excite the rotatory motion.
Word Of The Day