It will sway or vibrate up and down, ultimately coming to rest in its position of equilibrium.
The flame there is much H K' L affected by the nodal pressure changes, while the other two vibrate only slightly.
The direct and reflected systems are practically equal, and by suitably timing the vibrations of the hand for each case the rope may be made to vibrate as a whole, as two halves, as three-thirds and so on.
We shall discuss the disturbance which is propagated from the source to the ear, and which there produces sound, and the modes in which various sources vibrate and give rise to the disturbance.
An ear of another type is found in the swollen second segment of the feeler in many male gnats and midges, the cuticle between this segment and the third forming an annular drum which is connected with numerous nerveendings, while the fine bristles on the more distal segments vibrate in response to the note produced by the humming of the female.
This mode of suspension enables the conductor CC to vibrate freely like a balance, but at the same time very large currents can easily be passed through this perfectly flexible joint.
By similar methods, a circular plate may be made to exhibit nodal lines dividing the surface by diametral lines into four or a greater, but always even, number of sectors, an odd number being incompatible with the general law of stationary waves that the parts of a body adjoining a nodal line on either side must always vibrate oppositely to each other.
The reason of this is, that the segments of the plate AOD, BOC always vibrate in the same direction, but oppo sitely to the segments AOB, DOC. Hence, when the pasteboard is in its place, there are two waves of same phase starting from the two former segments, and reaching the ear after equal distances of transmission through the air, are again in the same phase, and produce on the ear a conjunct impression.
It is difficult to describe my emotions when I stood on the point which overhangs the American Falls and felt the air vibrate and the earth tremble.
If both vibrate, the point describes a curve which appears continuous through the persistence of the retinal impression.
When the air in the singing tube is singing, it forces the gas in the jet tube to vibrate in the same period and in such phase that at the nozzle the pressure in both tubes shall be the same.
Sellmeier adopted the elastic-solid theory of the ether, and imagined the molecules to be attached to the ether surrounding them, but free to vibrate about their mean positions within a limited range.
If a rigid rod, or a wing with a rigid anterior margin, be made to vibrate, the vibration is characterized by an unequal jerky motion, at the end of the down and up strokes, which contrasts strangely with the smooth, steady fanning movement peculiar to natural wings.
Then the middle point is a loop, and the middle flame is only slightly affected, while the other two, now being at nodes, vibrate strongly.
There is, however, another reason why wings should be made to vibrate at high speeds.
Let, now, the plate be made in the usual manner to vibrate so as to exhibit two nodal lines coinciding with two rectangular diameters.
Further, the original nodes are always at rest, and the intervening sections vibrate to and fro.
This physiologist in 1867 2 showed that all natural wings, whether of the insect, bird or bat, are screws structurally, and that they act as screws when the y are made to vibrate, from the fact that they twist in opposite directions during the down and up strokes.
5 The writer recommended the use of a flexible plate at the source of sound, which would vibrate in response to the varying pressure of the bons' air, and thus open and close an electric circuit, and of a similar plate at the receiving station, which would be acted on electromagnetically and thus give out as many pulsations as there are breaks in the current.
Long, where I can vibrate in cold or rainy weather.
The product MH is first determined by suspending the magnet horizontally, and causing it to vibrate in small arcs.
If both forks vibrate, an observer looking through the microscope sees the bright point describing Lissajous figures.
The chief experimental basis for supposing that a train of longitudinal waves with displacement curve of this kind arouses the sensation of a pure tone is that the more nearly a source is made to vibrate with a single simple harmonic motion, and therefore, presumably, the more nearly it sends out such a harmonic train, the more nearly does the note heard approximate to a single pure tone.
When the wing is made to vibrate, its several portions travel through the spaces d b f, j k 1, g h i, and e a c in exactly the same interval of time.
If the anterior margins of natural and artificial wings were rigid, it would be impossible to make them vibrate smoothly and continuously.
To vibrate by means of two c, c', Inner portions of wings rods which extend between attached to central shaft of the crank and the roots of f, India-rubber in a state of model by elastic bands at e.
- Elastic Spiral Wing, its action, to form a mobile heli vibrate by a direct piston action, propelled vertically, horizontally a b, Anterior margin of wing, to which the neurae or ribs are affixed.