Thus a= 2.54 cros., or one inch very nearly.] Tables Of Surface-Tension In the following tables the units of length, mass and time are the centimetre, the gramme and the second, and the unit of force is that which if it acted on one gramme for one second would communicate to it a velocity of one centimetre per second: - Table of Surface-Tension at 20° C. (Quincke).
In.," or 14,000 grms. per square centimetre, and a similar view prevailed among high authorities more than twenty years later.
System a subdivision of the latter, viz, the gramme, is adopted, and is associated with the centimetre as the unit of length, and the mean solar second as the unit of time.
We shall regard the external force as applied in the form of a pressure X per square centimetre parallel to the line of propagation and varied from point to point as required in order to make the disturbance travel on unchanged in form with the specified velocity U.
System they are the gramme, centimetre and second.
The kinetic energy per cubic centimetre is 2 pu t, where is the density and u is the velocity of disturbance due to the passage of the wave.
System it is that force which acting on one gramme for one second produces a velocity of one centimetre per second; this unit is known as the dyne.
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 many experiments, however, different inductions and frequencies are employed, and the hysteresis-loss is often expressed as ergs per cubic centimetre per cycle and sometimes as horse-power per ton.
Therefore the momentum entering through a square centimetre at B per second is equal to the momentum leaving through a square centimetre at A.
The number of oxygen molecules per cubic centimetre determines the width of the oxygen lines, though nitrogen molecules may be mixed with them without materially affecting the appearance.
Hence his measurements are all directly comparable with modern electrostatic measurements in which the unit of capacity is that of a sphere r centimetre in radius.
The closed figure a c d e a is variously called a hysteresis curve or diagram or loop. The area f HdB enclosed by it represents the work done in carrying a cubic centimetre of the iron through the corresponding magnetic cycle; expressed in ergs this work is I HdB.
According to modern measurements the solar radiation imparts almost 3 grammecalories of energy per minute per square centimetre at the distance of the earth, which is about Iï¿½3 X io s ergs per sec. per cm.
Hence the force required to drive one gramme-molecule of sugar through water with a velocity of one centimetre per second may be calculated as some thousands of millions of kilogrammes weight.
In one experiment the jet issued horizontally from an orifice of about half a centimetre in diameter, and almost immediately assumed a rippled outline.
That is, if an amount jIo is absorbed in the first centimetre, jI 1 is absorbed in the second, and so on.
Centimetre, exposed perpendicularly to the sun's rays, would receive sufficient energy per minute to raise 2.54 grams of water I ° C. Langley's general determination of the constant was greater than this-3 o to 3.5 calories; more recently C. G.
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.
Thus, if d= 1, q -1 -= -115; or for a diameter of one centimetre the disturbance is multiplied 2.7 times in about one-ninth of a second.
The gramme was intended to be equal to the weight of a cubic centimetre of pure water at a certain temperature, but the equality is only approximate.
Taking the centimetre, gramme and second as our fundamental units, the most convenient unit of force is that which, acting on a gramme for a second, produces in it a velocity of a centimetre per second; this is called a Dyne.
The unit of work is that which is required to overcome a resistance of a dyne over a centimetre, and is called an Erg.
The magnetic flux per square centimetre at any point (B, B, or 0) is briefly called the induction, or, especially by electrical engineers, the flux-density.
In the case supposed therefore the total force per square centimetre is H2 F =2712-f-HI+B ?r (4 7r I +H)2 8?r B2 =87r.
He made use of the expression F =Wg=27r12+HI, where W is the weight in grammes per square centimetre of sectional area, and g is the intensity of gravity which was taken as.
Hence the work done on the air is (P-+zw)v, and the work done per cubic centimetre is (P+Zw)v/V.
This acceleration is denoted by g; its value at Greenwich is about 981 centimetre-second units, or 322 feet per second.
In the case of diphtheria the antitoxic power of the serum may reach Boo units per cubic centimetre, or even more.
We have then 11=Io(1 j) I =I 1(1j) =Io(1 j)2 1 3 =1 2 (1 - j) =Io(11)3 and so on, so that if I is the intensity after passing through a thickness t in centimetres I = Io(1 We might call j, which is the proportion absorbed in one centimetre, the "coefficient of absorption" of the medium.
The organ figured is one of the catkins (about a centimetre in length) which were borne laterally on the spike.