Physics and Chemistry of Mining and Mine Ventilation: A Practical Handbook for Vocational Schools, and for Those Qualifying for Mine Foreman and Mine Inspector Certificates |
Other editions - View all
Physics and Chemistry of Mining and Mine Ventilation: A Practical Handbook ... Joseph James Walsh No preview available - 2023 |
Physics and Chemistry of Mining and Mine Ventilation: A Practical Handbook ... Joseph James Walsh No preview available - 2016 |
Common terms and phrases
acetylene actual water gauge air current air passing air per minute airway aneroid anthracite atmosphere atomic weight black damp body burette burn carbon dioxide carbon monoxide chemical coal coefficient of friction cu.ft cubic feet cubic foot density diameter difference downcast shaft due to combustion equal EXAMPLE fall fan running feet of air fire firedamp flame force FORMULAS FOR FINDING gases horse-power hydrogen hygrometer increase lamp liquid manometric efficiency marsh gas means mechanical efficiency mercury methane mines mixture molecules motive column necessary nitrogen oxygen oxygen content passing per minute pipette pounds pressure consumed pressure per square produce a velocity quantity of air relative humidity resistance revolutions per minute rubbing surface sample Solution specific gravity specific heat splits sq.ft square foot square inch theoretical water gauge thermometer tion total pressure tube velocity of 500 ventilating equip volume of air weight per cubic wet-bulb
Popular passages
Page 4 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 192 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Page 120 - The horse power of a steam engine is given by the equation , plan = ~ where p = mean effective pressure in pounds per square inch, l = length of stroke in feet, a = area of piston in square inches, n = number of strokes per minute, or twice the number of revolutions per minute.
Page 5 - Whatever draws or presses another is as much drawn or pressed by that other. If you press a stone with your finger, the finger is also pressed by the stone.
Page 217 - AND ENGINEERING BOOKS D. Van Nostrand Company have on hand the largest assortment in the United States of such books issued by American and foreign publishers. All inquiries are cheerfully and carefully answered and complete catalogs.
Page 5 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Page 193 - Dry Measure. — 2 pints = 1 quart; 8 quarts = 1 peck; 4 pecks = 1 bushel.
Page 89 - The Specific Heat of a body signifies its capacity for heat or the quantity of heat required to raise the temperature of the body one degree Fahrenheit, compared with that required to raise the temperature of an equal weight of water one degree.
Page 10 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Page 174 - ... a — sectional area of airway in square feet ; H = horsepower; k = coefficient of friction = .0000000217; / = length of airway in feet; o = perimeter of airway in feet; / = ventilating pressure in pounds per square foot; P = total ventilating pressure in pounds; q = quantity of air in cubic feet per minute; s = rubbing surface in square feet; u = units of power in foot-pounds per minute; v = velocity in feet per minute; W = water-gauge in inches of water. To render the formulas more convenient...