Word Finder - rotation

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The act of turning around a centre or an axis.

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The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere.

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A single complete cycle around a centre or an axis.

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Earth's moon completes a rotation every twenty-seven days or so.

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A regular variation in a sequence, such as to even-out wear, or people taking turns in a task; a duty roster.

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In rotation, each member of the group would be responsible for the beacon fire.

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An operation on a metric space that is a continuous isometry and fixes at least one point.

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The function mapping (x,y) to (−y,x) is a rotation.

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The set of starting pitchers of a team.

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The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2)

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Repeated play on a radio station, etc.

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The new single enjoyed heavy rotation on MTV.

The rotation of the earth thus fixes the directions of north and south and defines those of east and west.

Sent her to half a dozen agencies on rotation.

The following rotation is frequently adopted.

Such rotation can obviously be controlled within limits that need not be further considered.

Already anxieties appear as to the theological verdict upon two of his fundamental views - the infinitude of the universe, and the earth's rotation round the sun.

Under hay are included the produce of clover, sainfoin and rotation grasses, and also that of permanent meadow.

The opportunities which rotation cropping affords for the cleaning of the land from weeds is another distinct element of advantage.

Very little of the lime of the crops, however, goes off in the saleable products of the farm in the case of the self-supporting rotation under consideration.

Another important consequence of rotation is the deviation produced in moving bodies relatively to the surface.

The hay made from clover, sainfoin and grasses under rotation generally gives a bigger average yield than that from permanent grass land.

Remarkable as Hellriegel's discovery was, it merely furnished the explanation of a fact which had been empirically established by the husbandman long before, and had received most intelligent application when the old four-course (or Norfolk) rotation was devised.

Thus the smallest rotation of either head communicates to the corresponding slide motion, which, if the screws are accurate, is proportional to the amount through which the head is turned.

The cups are placed symmetrically on the end of the arms, and it is easy to see that the wind always has the hollow of one cup presented to it; the back of the cup on the opposite end of the cross also faces the wind, but the pressure on it is naturally less, and hence a continual rotation is produced; each cup in turn as it comes round providing the necessary force.

This cone is driven by gearing from the wire drum, so that it rotates at the speed of the outgoing wire, the direction of rotation being such as to cause the nut to travel towards the smaller end of the cone.

In the rotation of crops there is an amazing diversityshifts of two years, three years, four years, six years, and in many cases whatever order strikes the fancy of the farmer.

In whatever form energy is produced and distributed to the train it ultimately appears as mechanical energy applied to turn one or more axles against the resistance to their rotation imposed by the weight on the wheels and the motion of the train.

This gigantic nebulous mass, of which the sun was only the central and somewhat more condensed portion, is supposed to have a movement of rotation on its axis.

Under the old Norfolk or four-course rotation (roots, barley, clover, wheat) land thus seeded with clover or grass seeds was intended to be ploughed up at the end of a year.

In the case of plants the method of procedure was to grow some of the most important crops of rotation, each separately year after year, for many years in succession on the same land, (a) without manure, (b) with farmyard manure and (c) with a great variety of chemical manures; the same description of manure being, as a rule, applied year after year on the same plot.

Experiments on an actual course of rotation, without manure, and with different manures, have also been made.

But the average produce over forty years of continuous growth of barley was, in all cases where nitrogenous and mineral manures (containing phosphates) were used together, much higher than the average produce of the crop grown in ordinary rotation in the United Kingdom, and very much higher than the average in most other countries when so grown.

Whatever the specific rotation, there may in practice be deviations from the plan of retaining on the farm the whole of the root-crops, the straw of the grain crops and the leguminous fodder crops (clover, vetches, sainfoin, &c.) for the production of meat or milk, and, coincidently, for that of manure to be returned to the land.

But much less potash than phosphoric acid is exported in the cereal grains, much more being retained in the straw, whilst the other products of the rotation - the root and leguminous crops - which are also supposed to be retained on the farm, contain very much more potash than the cereals, and comparatively little of it is exported in meat and milk.

The metropolitan of Athens is president, and there are four other members appointed by the government in annual rotation from the senior bishops.

There is no difficulty in conceiving how a nebula, quite independently of any internal motion of its parts, shall also have had as a whole a movement of rotation.

In fact a little consideration of the theory of probabilities will show it to be infinitely probable that such an object should really have some movement of rotation, no matter by what causes the nebula may have originated.

The rotation of the planets on their axes is also explained as a consequence of the nebular theory, for at the time of the first formation of the planet it must have participated in the rotation of the whole nebula, and by the subsequent contraction of the planet the speed with which the rotation was performed must have been accelerated.

Repetition of one crop in the field exhausts the ground; but rotation of the crops is good for the soil.

Whilst much grass land has been laid down with the intention from the outset that it should be permanent, at the same time some considerable areas have through stress of circumstances been allowed to drift from the temporary or rotation grass area to the permanent list, and have thus still further diminished the area formerly under the dominion of the plough.

The benefits that accrue from the practice of rotation are well illustrated in the results obtained from the investigations at Rothamsted into the simple four-course system, which may fairly be regarded as a self-supporting system.

Of potash, each of the rotation crops takes up very much more than of phosphoric acid.

Of lime, very little is taken up by the cereal crops, and by the root-crops much less than of potash; more by the leguminous than by the other crops, and, by the clover especially, sometimes much more than by all the other crops of the rotation put together.

Cereal pests can only be treated by general cleanliness and good farming, and of course they are largely kept down by the rotation of crops.

It is believed that the rotation must differ with every variety of soil, with the result that each planter has his own method, and little can be said in general.

A more careful study of the physical as well as the chemical properties of a soil must precede intelligent experimentation in rotation.

The landlord lets his land to two or more persons jointly, who undertake to restore it to him in good condition with one-third of it interrozzito, that is, fallow, so as to be cultivated the following year according to triennial rotation.

Protoplasmic Movements.In the cells of many plants the cytoplasm frequently exhibits movements of circulation or rotation.

The greater freedom of cropping and the less close adherence to the formal system of rotation of crops, which characterize the early years of the 10th century, rest upon a scientific basis.

Thus the cereal crops, when grown in rotation, yield more produce for sale in the season of growth than when grown continuously.

Although many different rotations of crops are practised, they may for the most part be considered as little more than local adaptations of the system of alternating root-crops and leguminous crops with cereal crops, as exemplified in the old four-course rotation - roots, barley, clover, wheat.

Of phosphoric acid, the cereal crops take up as much as, or more than, any other crops of the rotation, excepting clover; and the greater portion thus taken up is lost to the farm in the saleable product - the grain.

Nothing definite can be said with regard to a rotation of crops Sea Island Cotton - Carolina Sea Island Florida „ „ Georgia „ Barbados „ „ Egyptian Cottons Yannovitch.

Fields considered utterly used up, and allowed to " rest " for years, when cultivated again have produced better crops than those which had been under a more or less thoughtful rotation.

This may consist simply in attaching one end of the wire to an index lever and the other to a fixed support, or the elongation of the wire may cause a rotation in a mirror from which a ray of light is reflected, and the movement of this ray over a scale will then provide the necessary means of indication.

They are dextrorotatory, and the specific rotation is numerically greater than that of albumin; hence the proteids are, in general, dextrorotatory.

The specific rotation also varies with the concentration; this is due to the dissociation of complex molecules into simpler ones, a view confirmed by cryoscopic measurements.

Hence processes have been patented in which the objects to be plated are suspended in revolving drums between the anodes, the rotation of the drum causing the constant renewal of surfaces and affording a burnishing action at the same time.

This is called the direct orthogonal substitution, because the sense of rotation from the axis of X i to the axis of X, is the same as that from that of x i to that of x 2.

The field at the centre of a circular conductor of radius r through which current is passing is H = 27ri/r, (3) the direction of the force being along the axis and related to the direction of the current as the thrust of a corkscrew to its rotation.

The direction of the force is parallel to the axis of the coil, and related to the direction of the current as the thrust of a corkscrew to its rotation.