Elementary Introduction to Practical Mechanics: Illustrated by Numerous ExamplesLongmans, 1870 - 324 pages |
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Page 19
... Hence we infer the general principle- The number of units of work yielded by any agent in a given time is the true measure of its efficiency or working power . Of course it follows from this principle that the working powers of two ...
... Hence we infer the general principle- The number of units of work yielded by any agent in a given time is the true measure of its efficiency or working power . Of course it follows from this principle that the working powers of two ...
Page 20
... Hence Def . - A steam engine works with one horse - power when it yields 33,000 units of work per minute . Of course an engine of n horse - power yields n times 33,000 units of work per minute . Ex . 73. The piston of a steam engine is ...
... Hence Def . - A steam engine works with one horse - power when it yields 33,000 units of work per minute . Of course an engine of n horse - power yields n times 33,000 units of work per minute . Ex . 73. The piston of a steam engine is ...
Page 24
... hence the number of cubic feet of water is found . ] Ans . 7763 cub . ft . Ex . 95. The diameter of the piston of an engine is 80 in . , the mean pressure of the steam is 12 lbs . per square inch , the length of the stroke is 10 ft ...
... hence the number of cubic feet of water is found . ] Ans . 7763 cub . ft . Ex . 95. The diameter of the piston of an engine is 80 in . , the mean pressure of the steam is 12 lbs . per square inch , the length of the stroke is 10 ft ...
Page 25
... hence if P lbs . of water descend through h feet , they will accumulate Ph units of work ; and if , moreover , we suppose this water to descend against an obstacle , such as the float boards of a water- wheel , the amount of work so ...
... hence if P lbs . of water descend through h feet , they will accumulate Ph units of work ; and if , moreover , we suppose this water to descend against an obstacle , such as the float boards of a water- wheel , the amount of work so ...
Page 38
... Hence if u is the required number of units v = wall- ) 2 Hence also the number of units of work ( U1 ) required to wind up the whole rope is given by the formula 1 - ξωτ . Ex . 135. A weight of 2 cwt . has to be raised from a depth ...
... Hence if u is the required number of units v = wall- ) 2 Hence also the number of units of work ( U1 ) required to wind up the whole rope is given by the formula 1 - ξωτ . Ex . 135. A weight of 2 cwt . has to be raised from a depth ...
Common terms and phrases
ABCD angle of resistance angular angular velocity axis axle beam body brickwork cast iron centre of gravity circle circumference coefficient of friction Crown 8vo cubic foot curve cylinder described determine the number diameter direction distance draw Edition engine epicycloid equal equation equilibrium expended extrados forces acting formula friction frustum given hence horizontal horse-power inclined inclined plane last Example length limiting angle magnitude mass middle point minute modulus moment of inertia motion moving number of units oscillation P₁ parallel forces passing perpendicular plane pressure principle principle of moments Prop pulley R₁ radius raised reaction represent respectively rest resultant right angles rope round screw sliding space square inch steam suppose surface teeth thick thread tion triangle vertical vols wall weight wheel Woodcuts wrought iron
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