Arithmetic, Mensuration and Use of Letters in Formulas, Principles of Mechanics, Machine Elements, Mechanics of Fluids, Strength of Materials, Elements of Electricity and Magnetism, Heat and Steam |
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Page 26
... ampere , or the practical unit denoting the rate of flow of an electric current , or the strength of an electric current . The ohm , or the practical unit of resistance . The volt , or the practical unit of electromotive force , or ...
... ampere , or the practical unit denoting the rate of flow of an electric current , or the strength of an electric current . The ohm , or the practical unit of resistance . The volt , or the practical unit of electromotive force , or ...
Page 27
... ampere ; if two unit quan- tities are flowing continuously every second , then the strength . of current is two amperes , and so on . It makes no difference in the number of amperes whether the current flows for a long period or for ...
... ampere ; if two unit quan- tities are flowing continuously every second , then the strength . of current is two amperes , and so on . It makes no difference in the number of amperes whether the current flows for a long period or for ...
Page 30
... ampere or fractions or multiples of one ampere . Fig . 35 shows the general form of a standard Weston ammeter used for commercial testing purposes . The strength of the current flowing in a circuit can be measured directly in amperes by ...
... ampere or fractions or multiples of one ampere . Fig . 35 shows the general form of a standard Weston ammeter used for commercial testing purposes . The strength of the current flowing in a circuit can be measured directly in amperes by ...
Page 31
... ampere , it offers the same amount , no more nor less , to a current of 10 amperes . Hence , the resistance of a given conductor at equal temperatures is always constant , irrespective of the strength of current flowing through it or ...
... ampere , it offers the same amount , no more nor less , to a current of 10 amperes . Hence , the resistance of a given conductor at equal temperatures is always constant , irrespective of the strength of current flowing through it or ...
Page 45
... ampere in a circuit whose resistance is one ohm . With a known resist- ance in ohms and a known strength of current in amperes , the electromotive force in volts is determined by Ohm's law , Art . 34 , for , by transposing , E = C R ...
... ampere in a circuit whose resistance is one ohm . With a known resist- ance in ohms and a known strength of current in amperes , the electromotive force in volts is determined by Ohm's law , Art . 34 , for , by transposing , E = C R ...
Common terms and phrases
12 inches altered number amperes Applying rule base belt block and tackle body boiler called center of gravity cipher circle circuit circumference conductor cube root cubic foot cubic inches cylinder decimal places decimal point denominator diametral pitch distance divided dividend divisor driven pulley driven wheel electricity electromotive force equal EXAMPLE.-What EXAMPLES FOR PRACTICE feet per minute foot foot-pounds formula fraction frustum gallons gear gear-wheel given number heat Hence horsepower inches in diameter iron kinetic energy length lever magnetic minuend motion multiplied number of revolutions number of teeth obtained ohms pipe piston pounds of water pounds per square pressure pulley pump quantity quotient ratio remainder resistance revolutions per minute rope screw shaft shown in Fig side SOLUTION square inch square root steam subtract surface temperature trial divisor triangle tube unit velocity volts volume weight whole numbers
Popular passages
Page 39 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 21 - A fraction is one or more of the equal parts of a unit...
Page 10 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq.
Page 19 - Rule.— I. Write the divisor at the left of the dividend, with a line between them.
Page 11 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 4 - Divide the continued product of the mean effective pressure in pounds per square inch, the length of the stroke in feet, the area of the piston in square inches, and the number of strokes per minute, by 33,000 ; the result will be the horsepower.
Page 59 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.
Page 3 - The pressure per unit of area exerted anywhere upon a mass of liquid is transmitted undiminished in all directions, and acts with the same force upon all surfaces, in a direction at right angles to those surfaces.
Page 62 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Page 11 - Every body continues in a state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by a force impressed upon it.