noun
definition
A cubic curve.
synonyms
adjective
definition
Used in the names of units of volume formed by multiplying a unit of length by itself twice.
example
cubic foot
definition
Of a class of polynomial of the form ax^3 + bx^2 + cx + d
definition
Having three equal axes and all angles 90°.
example
cubic cleavage
synonyms
Examples of cubic in a Sentence
Working with two different specimens, he found that the hysteresis loss in ergs per cubic centimetre (W) was fairly represented by o 00125B 1 6 and o o0101B 1 ' 6 respectively, the maximum induction ranging from about 300 to 3000.
In one case the hysteresis loss per cubic centimetre per cycle was 16,100 ergs for B =1 5,900, and only 1200 ergs for B = 20,200, the highest induction obtained in the experiment; possibly it would have vanished before B had reached 21,000.2 These experiments prove that actual friction must be almost entirely absent, and, as Baily remarks, the agreement of the results with the previously suggested deduction affords a strong verification of Ewing's form of the molecular theory.
Cubic equations were solved geometrically by determining the intersections of conic sections.
The salt has been dissolved out of its original matrix, and the cavity so formed has then been filled with fine clayey or other mineral matter, forming a cubic cast.
It weighs about 36 lb to the cubic foot.
A cubic foot weighs about 35 to 40 lb.
A cubic foot weighs about 45 lb.
Spanish mahogany weighs about 56 lb to the cubic ft., and the Honduras variety about 36 lb.
The average weight of a cubic foot is about 61 lb.
The annual timber yield of the Indian forests is about fifty millions of cubic feet, excluding what is used for local purposes.
We have in it a particular kind of correspondence of two points on a cubic curve, viz.
The wood is very heavy and hard, weighing 70 lb the cubic foot; the colour is dark brown; it is used in Spain and Italy for furniture, and in the former country for firewood and charcoal.
West Virginia, estimates that in fairly good producing sand a cubic foot of rock contains from 6 to 12 pints of oil.
Problems in artillery occupy two out of nine books; the sixth treats of fortification; the ninth gives several examples of the solution of cubic equations.
A standard sodium hydrate solution can be prepared by dissolving 42 grammes of sodium hydrate, making up to a litre, and diluting until one cubic centimetre is exactly equivalent to one cubic centimetre of the sulphuric acid.
We may therefore regard the nitrogen atoms as occupying the centres of a cubic space lattice composed of iodine atoms, between which the hydrogen atoms are distributed on the tetrahedron face normals.
For the quadratic it is the discriminant (ab) 2 and for ax2 the cubic the quadratic covariant (ab) 2 axbx.
The Roman theory of the amphora being the cubic foot makes it 1569 cub.
Though it has no exact relation to the congius or amphora, yet it is closely = 4977 grains, the 1/80th of the cubic foot of water.
The galena group includes several other cubic minerals, such as argentite (q.v.).
Mention may also be made here of clausthalite (lead selenide, PbSe) and altaite (lead telluride, PbTe), which, with their lead-grey colour and perfect cubic cleavage, closely resemble galena in appearance; these species are named after the localities at which they were originally found, namely, Klausthal in the Harz and the Altai mountains in Asiatic Russia.
The compound FeS 2 is dimorphous, and the modern practice is to distinguish the cubic forms as pyrites and the orthorhombic as marcasite (q.v.).
Sometimes, however, the term pyrites is loosely applied to both species, and the cubic pyrites is then differentiated by the name "pyrite" - a form which brings the last syllable into harmony with the spelling of the names of most minerals.
Iron pyrites, or pyrite, belongs crystallographically to the parallelfaced hemihedral class of the cubic system.
Pyrites presents a conchoidal fracture, and a very indistinct cubic cleavage.
It crystallizes in the cubic system, usually in cubes, pentagonal dodecahedra or octahedra, often of great beauty and perfection.
Crystals belonging to the cubic system should not be birefringent unless strained; diamond often displays double refraction particularly in the neighbourhood of inclusions, both liquid and solid; this is probably due to strain, and the spontaneous explosion of diamonds has often been observed.
Carbonado or " black diamond," found in Bahia (also recently in Minas Geraes), is a black material with a minutely crystalline structure somewhat porous, opaque, resembling charcoal in appearance, devoid of cleavage, rather harder than diamond, but of less specific gravity; it sometimes displays a rude cubic crystalline form.
The ground is transferred in trucks to the shaft where it is automatically tipped into skips holding 96 cubic ft.
Graphitic carbon in cubic form (cliftonite) has also been found in certain meteoric " irons," for example in those from Magura in Szepes county, Hungary, and Youndegin near York in Western Australia.
Crystals of blende belong to that subclass of the cubic system in which there are six planes of symmetry parallel to the faces of the rhombic dodecahedron and none parallel to the cubic faces; in other words, the crystals are cubic with inclined hemihedrism, and have no centre of symmetry.
It becomes then the duty of the engineer in charge to use every effort to get its full value out of every cubic foot of water.
This would increase the storage capacity 22 times, or to about 9,375,000 millions of cubic feet.
The method of estimating the area of irregular fields and the cubic contents of granaries, &c., is very faulty.
Halite or rock-salt crystallizes in the cubic system, usually in cubes, rarely in octahedra; the cubes being solid, unlike the skeleton-cubes obtained by rapid evaporation of brine.
The mineral has perfect cubic cleavage.
Cubic pseudomorphs representing rock-salt are sometimes seen in strata which have been deposited in shallow water, especially on the margin of a salt-lake.
In the geometry of plane curves, the term parabola is often used to denote the curves given by the general equation a' n x n = ym+n, thus ax= y 2 is the quadratic or Apollonian parabola; a 2 x = y 3 is the cubic parabola, a 3 x = y4 is the biquadratic parabola; semi parabolas have the general equation ax n-1 = yn, thus ax e = y 3 is the semicubical parabola and ax 3 = y 4 the semibiquadratic parabola.
The cartesian parabola is a cubic curve which is also known as the trident of Newton on account of its three-pronged form.
John Wallis utilized the intersections of this curve with a right line to solve cubic equations, and Edmund Halley solved sextic equations with the aid of a circle.
Diverging parabolas are cubic curves given by the equation y 2 = 3 -f-bx 2 -cx+d.
Newton discussed the five forms which arise from the relations of the roots of the cubic equation.
This quantity is now, as the result of further experiments, added to the values of h, and also represented in the formula for the specific heat itself by the cubic term.
Even then, however, the amount of operative heat is very small in comparison with that which passes through the steam-engine, per cubic foot swept through by the piston, for the change of state which water undergoes in its transformation into steam involves the taking in of much more heat than can be communicated to air in changing its temperature within such a range as is practicable.
Sodium combines directly with the halogens to form salts which are soluble in water and crystallize in the cubic system.
Now these integrations are quite intractable, even for a very simple mathematical assumption of the function f(v), say the quadratic or cubic law, f(v) = v 2 /k or v3/k.
Chemically, it is thus indentical with the cubic mineral diamond, but between the two there are very wide differences in physical characters.
The Habra barrage holds 38,000,000 cubic metres; that on the Sig 18,000,000.
In such definition an attempt has been made to avoid former confusion of expression as to capacity, cubic measure, and volume; the litre being recognized as a measure of capacity holding a given weight of water.
Hence a cubic foot of water would weigh 62.281 lb avoir., and not 62.321 lb as at present legally taken.