As it rotates round the pole, its outline varies with the different positions.
Separating with regret from her cradle, but attached to the Earth by indissoluble ties of attraction, she rotates round us in a month, from west to east, and this movement keeps her back a little each day in relation to the stars.
We are not even sure that she rotates upon herself, so contradictory are the observations, and so hard is it to distinguish anything clearly upon her surface.
As it rotates round the Earth, and constantly changes its position with respect to the Sun, we see more or less of its illuminated hemisphere, and the result is the phases that every one knows so well.
It has a considerable inclination, and rotates from east to west.
And while it thus glides along the lines of solar attraction, the terrestrial ball rotates rapidly upon itself in twenty-four hours.
We know that in the case of light the extraordinary beam rotates round the ordinary one; and we have here been operating on the extraordinary heat-beam, which, as regards double refraction, behaves exactly like a beam of light.
When you turn the spar round, the extraordinary image of the dot rotates round the ordinary one, which remains fixed.
The earth's axis rotates about the pole of the ecliptic, making one revolution and a twenty-six thousandth part of a revolution in the sidereal year, in the opposite direction to its orbital motion.
But since during this action the wheel D turns relatively to the pin b, the moon evidently rotates about its axis with an angular velocity precisely equal to that of its orbital motion.
The whole furnace, electrodes and all, rotates about the line KL for the purpose of pouring out the molten slag and purified metal through the spout J at the end of the process.
The vertical line at any place being the fundamental axis of the apparent system of co-ordinates, this system rotates with the earth, and so seems to us as fixed.
The three shoes of each group rest upon a bronze sleeve which is in halves and which surrounds the crank-pin and rotates relatively to it once in each crank-shaft revolution.
The inside of the distributor rotates and directs a charge of air to the cylinder next to fire.
This member constitutes true rotating poles for the magnet and rotates in a field structure, composed of two laminated field pieces, riveted between two non-magnetic rings.
So that the spherical vortex atom would possess rotation on an axis, and it would be a magnet, as I shall prove later on, because it rotates in an electro-magnetic medium.
Aether possesses a rotatory motion, by which it rotates round the central body of the solar system, the sun.
Indeed, there can be no other physical explanation of the fact, that all the planets revolve round the sun in the same direction that the sun rotates on its axis, than the one here given, viz.
If there is one fact true in relation to the earth as a planet, it is that the earth rotates on its axis every 24 hours.
He supposes that a positive atom of electricity rotates in one direction while a negative atom rotates in the opposite direction.
Further, the sun also rotates on its axis in a period of 26 days.
When a coil rotates between the poles of a magnet, the wire moves across the lines of force and a current is induced in the coil if the circuit is closed.
This hollow globe rotates with the sun, because the whole globe of æther, which fills out the space of the subsequent solar system, rotates; therefore everything necessarily tends in one direction.
The moon is forsooth to be regarded as itself a planet with a definite charge of electricity, which is always equably maintained by light; as such it rotates circularly about the sun.
But it rotates in the same path wherein the earth rotates; therefore the latter operates upon it and draws it in its strange serpentine line around the sun.
This globe rotates also around its own axis and virtually in the same direction, according to which it performs its course or the sun rotates.
The bar rotatesas indicated by the arrow a and at the same time feeds longitudinally as shown by arrow b.
The spindle will then revolve one and one-half times faster than the lead-screw, provided the stud rotates at the same rate of speed as the main lathe spindle.
After this cut is completed, the lever is reversed which rotates the cutter one tooth, and the return movement places tooth No.
The latter rotates the cross-feed screw, which passes through a nut attached to slide D (Fig.
The dog has a projecting end or "tail," as it is commonly called, which enters a slot in the faceplate F and thereby drives or rotates the work, when power is applied to the lathe spindle onto which the faceplate is screwed.
As a boring mill table rotates in a counter-clockwise direction, the left-hand tool is reversed to bring the cutting edge at the rear.
The raising or lowering of the table is effected by shaft E, which rotates large nuts engaging the screws S.
The fuel burns in the furnace, the water is superheated in the boiler, the steam is directed by the pipes, the piston is moved by the steam pressure, and the fly-wheel rotates because of proper mechanism between it and the piston.
The moon rotates on her axis in about the same time, and hence we can only see one side of her.
All of these water-cooled engines and several standard air-cooled makes are of the reciprocating type that have stationary cylinders and crankcase while the crankshaft rotates like that of the motor boat.
In reality the head and foot are fixed and the shellrotates from right to left.
The shell thenrotates towards the left side through 180 deg.
The Earth rotates about an axis terminating at the north and south geographical poles, and perpendicular to the equator; the period of rotation is termed the day (q.
The simplest possible example of this is the case of a particle at the lowest point of a smooth spherical bowl which rotates with constant angular velocity ([omega]) about the vertical diameter.
As soon as the glass gets soft he will find that he no longer rotates the glass at the same speed by the right and left hand, and, moreover, he will probably unconsciously bend the tube, and even deform it, by pushing or pulling.
While the limb is partly flexed, a slight degree of rotation of the leg at the knee is possible, and during this movement the cartilages glide from side to side, and the tibia rotates below them.
The surgeon grasps the wrist and elbow and firmlyrotates the humerus away from the middle line (Fig.
When the deformity is bilateral, the patient abducts the thigh and rotates the limb outwards at the hip to disguise the deformity, and to allow the projecting knees to pass each other.
When the strip is subjected to longitudinal tension the pointer rotates through a considerable angle.
It may reasonably be objected that there should be here no bands at all, since the same considerations would give an increasingly red band from B' to A', whereas by hypothesis the discrotates so fast as to give an entirely uniform color.
As the rod rotates forward yet faster, no change is seen except that the system of bands moves backward more and more slowly.
As before, the system at first rotates backward, then lies still, and then moves forward until it is dissolved.
But this entire system of bands, instead of lying motionless over the disc as did the systems hitherto described, itself rotates rapidly in the opposite direction from disc to rod.
Owing to the fact that Venus shows no fixed definite marking that we can watch, it is still a matter of controversy as to the time in which it rotates upon its axis.
The Earth rotates on its axis and revolves round the Sun.
Others believe that itrotates in a little less than twenty-four hours.
Schiaparelli and some other observers consider that it rotates in the same time as it revolves round the Sun.
They should be connected in one circuit and the deflection of the ammeter observed when the armature is held stationary, and when it rotates with various loads.
The fact that Jupiter rotates in ten hours and the satellite makes a revolution around him in twelve hours results in the satellite’s taking five of Jupiter’s days to cross from the eastern horizon to the western.
Moreover, it is believed that the axis on which Mercury rotates stands perpendicular to his orbit.
There is one vital point concerning the development of Venus upon which we have as yet no positive knowledge: the length of time in which she rotateson her axis.
The pendulum in this case is a heavy horizontal disk suspended by a wire, and the disk rotates first in one direction and then in the other, twisting and untwisting the wire.
In a lathe, it is the work that revolves or rotates against the tool.
Many efforts have been made to produce a rotary engine in which the piston rotates instead of reciprocating, thus doing away with the work of overcoming inertia.
As the drive shaft rotates the slotted link is oscillated back and forth on its own center.
Then there is the horizontal axis, which is at right angles to the line of flight; and this is the axis upon which it rotates when either under-spin or top has been applied to it.
One is a vertical one, and it is chiefly upon that axis that the golf ball rotates when it is pulled or sliced, or upon an axis that has something of the vertical element in it.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "rotates" in a variety of sentences. We hope that you will now be able to make sentences using this word.
