Practical Mathematics for the Engineer and ElectricianJoseph G. Branch publishing Company, 1912 - 143 σελίδες |
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Σελίδα 112
... sine curve which is used in calculations of alternating currents . The important thing , how- ever , is the power factor , and this can not be under- stood without a knowledge of cosines of angles . It is true there are tables giving ...
... sine curve which is used in calculations of alternating currents . The important thing , how- ever , is the power factor , and this can not be under- stood without a knowledge of cosines of angles . It is true there are tables giving ...
Σελίδα 113
... sine becomes smaller , and the cosine is to the left of A. In the above definitions we have assumed that the radius ... sine of the angle COB . If the radius is not 1 , then we must divide CB by the radius to get the sine of the angle ...
... sine becomes smaller , and the cosine is to the left of A. In the above definitions we have assumed that the radius ... sine of the angle COB . If the radius is not 1 , then we must divide CB by the radius to get the sine of the angle ...
Σελίδα 114
... sine and tangent lines become , and the shorter the cosine line becomes . So it is clear that as the angle increases from 0 ° to 90 ° the sine and Tangent . Sine C B cosine Sine , cosine , and tangent of an angle greater than 90 ° and ...
... sine and tangent lines become , and the shorter the cosine line becomes . So it is clear that as the angle increases from 0 ° to 90 ° the sine and Tangent . Sine C B cosine Sine , cosine , and tangent of an angle greater than 90 ° and ...
Σελίδα 115
... sine is minus , because it is measured downward from the horizontal line OB and is opposed in direction to the plus sine of the first angle . Between 270 ° and 360 ° the sine is minus and the cosine is plus . Table XIII gives the sines ...
... sine is minus , because it is measured downward from the horizontal line OB and is opposed in direction to the plus sine of the first angle . Between 270 ° and 360 ° the sine is minus and the cosine is plus . Table XIII gives the sines ...
Σελίδα 116
... sine of the angle . For example , the sine of 30 ° is one - half , and the elec- trical pressure at 30 ° is one - half of the pressure at 90 ° . From 180 ° to 360 ° the curve is below the horizon- tal line , which means that the ...
... sine of the angle . For example , the sine of 30 ° is one - half , and the elec- trical pressure at 30 ° is one - half of the pressure at 90 ° . From 180 ° to 360 ° the curve is below the horizon- tal line , which means that the ...
Άλλες εκδόσεις - Προβολή όλων
Practical Mathematics for the Engineer and Electrician Joseph Gerald Branch,Elmer Ellsworth Burns Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Practical Mathematics for the Engineer and Electrician (Classic Reprint) Elmer Ellsworth Burns Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Practical Mathematics for the Engineer and Electrician Joseph Gerald Branch,Elmer Ellsworth Burns Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
55 watts algebra alternating current amperes angle of lag Answer apparent power brake-horse-power British thermal units calorimeter cent of moisture cents per K. W. circle circular tank coil common fraction cosine cubic feet cubic foot decimal figures decimal places denominator diameter DIFFERENT PRESSURES divided electromotive force equals equation example find the area Find the circumference find the number gallons Gas Engine gives heat units Heating Value horse-power hour K. W. hour kilowatt hours latent heat length lever mean effective pressure minus multiply number of square pipe piston pound of combustible pound of steam pounds of coal pounds of water power factor pressure lines radiation radius rule sine square feet square inches square root steam at 212 stroke subtract TABLE temperature total heat turning force unburned coal water at 212 water evaporated watt hours watts per light weight of coal weight of water whole number zero
Δημοφιλή αποσπάσματα
Σελίδα 12 - Multiplying or dividing both terms of a fraction by the same number does not change the value of the fraction.
Σελίδα 22 - Multiply as in whole numbers, and point off as many decimal places in the product as there are decimal places in the multiplicand and multiplier, supplying the deficiency, if any, by prefixing ciphers.
Σελίδα 122 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 43 - BTU) is the amount of heat required to raise one pound of water from 59° to 60° Fahrenheit.
Σελίδα 115 - L is the length of the stroke in feet, A is the area of the piston in square inches, and N is the number of power strokes per minute.
Σελίδα 78 - Let W = weight of ball at end of lever; w = weight of lever itself; V = weight of valve and spindle, all in pounds; L = distance between fulcrum and center of ball; I = distance between fulcrum and center of valve; g = distance between fulcrum and center of gravity of lever, all in inches; A =area of valve, in square inches; P = pressure of steam, in pounds per square inch, at which valve will open . Then PAxl = WXL+wXg+VXl; whence P = (WL+wg+Vl)+Al; W = (PAl-wg-Vl)+L; L = (PAl-wg-Vl)-SW.
Σελίδα 22 - CIRCUMFERENCE OF A CIRCLE To find the circumference of a circle multiply the diameter by 3.1416 this latter known as Pi or by the symbol IT thus.
Σελίδα 97 - Subtract its cube from the first period, and to the remainder annex the second period for a dividend. 3. Take three times the square of the root already found ; and, annexing two ciphers, place it on the left as a trial divisor.
Σελίδα 122 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 118 - ... because the method of measurement is specified. The tangent of the average monthly angle of lag is determined by multiplying by the factor 1,732 the ratio between the sum of and the difference between the readings of two single-phase watt-hour meters installed on the supply circuit. From the tangent of the angle of lag, the cosine of the angle of lag, or power factor, is determined by reference to the standard tables. The "demand...