Example. A generator delivers 2 to a bank of lamps. What is the ho generator? 110 X 1 Horsepower = 746 Example.-A direct-current mo at a voltage of 220. What is its 63. What horsepower is delivered by tor which supplies 120 amperes at a volta 64. In figuring up the lighting for a total current required is 42 amperes, and used, what horsepower generator is requ 65. A motor driving a lathe takes at 110 volts. What horsepower is it ta 66. A 10-h.p. motor running at rated a 220-volt main. How much current d To find the brake horsepower of ment such as is shown in Fig. formula is: 2π ered by a direct-current generaa voltage of 110 volts? g for a shop it is found that the es, and if 220-volt lamps are to be is required? takes 22 amperes direct current is it taking? t rated load receives power from rrent does it take from the main? wer of an engine an arrangeFig. 112 is used, and the 2T PRN 33,000 1 67. The pulley of an e 48 in. long and the weigh b.h.p. of the engine? 68. In a test an engine 54 in. long. What was t horsepower was 30. CHAPTER XIII THE BINOMIAL 63. Definitions and Miscellaneous Problem nomial is an expression containing two terms a +8, 3a + 2d, 2ab c, 4+ 2a, etc. Addition and Subtraction of Binomials.—To a more binomials put like terms under like terms That is, we take the like terms, which are m and proceed as in the addition of monomials. For example, if we wish to add a + b, 2a 3a+2b we have a + 2a + 3a or 6a and b + b 4b and (a + b) + (2a + b) + (3a + 2b) = 6a proceeding in the usual manner, we have a+b 2a + b 3a + 2b 6a+ 4b To subtract one binomial from another we like terms from like terms, the procedure being as with monomials. Example. Suppose we wish to subtract 2ab 3ab+3c. Then 3ab 2ab = ab and 3c с the difference is ab+2c, or proceeding in t manner: 3ab+3c 2ab+c ab + 2c 133 |