Questions and Problems in Elementary Physics; Containing Numerous Practical Examples and Exercises for Use of Pupils in High Schools and Academies (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ... 1 meter above an orifice whose area = 0.0075 meter. 742. How far below the surface of water must an orifice 1 centimeter square be placed in order that 300 liters shall be discharged per minute? 743. In what time will 72 gallons of water flow through an orifice, 1 inch in area, at the base of a vessel in which the liquid always stands 9 feet high? 744. In what time will 1000 liters of water flow through an orifice whose area = 2 square centim., which is at the base of a column of water 5 meters high? 745. In what time will a vessel filled with water be emptied by means of an aperture at the base, having an area of 1 sq. centim., if the vessel is 80 cen. high, and if the area of its base = 200 sq. centim. (Coeff. of efflux = 0.6)? (16000 c. c. = x. 1 (0.6). y2 /2gh ', 16000 c. c. = (0.6) x 4 1/2 (1000). 80; whence x =133 sec. answer.) 746. If a filled water tank is emptied in y2 hour by means of an aperture at the base, in what time will it be emptied when the orifice has twice the area? 747. Find the time required to empty a cylindrical vessel filled with water, having a diameter of 1.25 feet, a height of 2.25 feet, and an orifice at the base of square inch area. (Coeffl. of efflux 0.6)? 748. In what time will a filled Mariotte's flask be emptied if its diameter = 4 inch., its height 8 inch., and the area of the orifice at the base = square inch? 749. What is the shortest time in which a pond of 5 m. depth, 15 m. length and 10 m. breadth is emptied by means of a gate 1 m. high and 2 m. broad (Coeff. of contraction = 0.7; coeff. of efflux = 0.6)? AEROSTATICS AND AERODYNAMICS (pneumatics). (Take the pressure of 1 atmosphere = 15 pounds to the square inch, the barometer at 30 inch; or 1033 grams to the square centimeter, the barometer at 0.76 meter.) 7...