Table 7 Weights of Materials Average Weight in Pounds Material Per Cubic Foot Per Cubic Inch Average Weight in Grains per Cm³ Aluminum 160- Brass 512 0.0924 0.2960 2.56 8.20 Brick, pressed 150 2.40 Brick, common, hard 125 2.00 Cement, American, Rosendale 56 0.90 Cement, Portland 90 1.44 Clay, loose 63 1.01 Coal, broken, loose, Anthracite 54 0.86 Coal, broken, loose, Bituminous 49 0.78 Concrete 154 2.46 Copper 550 0.3184 8.80 Earth, common loam 76 1.22 Earth, packed 95 1.52 Gravel, dry, loose 90 to 106 1.44 to 1.70 Gravel, well shaken 99 to 117 1.58 to 1.87 Gold 1206 0.6975 19.30- Ice 58.7 0.94 Iron, cast 450 0.2600 7.20 Iron, wrought 480 0.2778 7.68 Lead 710 0.4109 11.36 Lime 53 0.85 Masonry, well dressed 165 2.64 Masonry, dry rubble 138 2.21 Mortar, hardened 103 1.65 Nickel 549 0.3177 8.78 Quartz 165 2.64 Sand, dry, loose 90 to 106 1.44 to 1.70 Sand, well shaken 99 to 117 1.58 to 1.87 Silver 657 0.3802 10.51 Snow, freshly fallen 5 to 12 0.08 to 0.19 Snow, wet and compacted 15 to 50 0.24 to 0.80 Steel 490 0.2835 7.84 Stone, gneiss 168 2.67 Stone, granite 170 2.72 Stone, limestone 168 2.69 Stone, marble Stone, sandstone Stone, shale Stone, slate Tar Tin Water Wood, dry, ash Wood, dry, cherry Wood, dry, chestnut 168 2.69 151 2.42 162 2.59 175 2.80 62 0.99 455 0.2632 7.28 62.5 1.00 38 0.61 42 0.67 41 0.66 Wood, dry, elm 35 0.56 Wood, dry, hemlock 25 0.40 Wood, dry, hickory 53 0.85 Wood, dry, lignum vitae 83 1.33 Wood, dry, mahogany 53 0.85 Wood, dry, maple 49 0.78 Wood, dry, oak, white 50 0.80 Wood, dry, pine, white Wood, dry, oak, other kinds Wood, dry, pine, yellow 32 to 45 25 34 to 45 0.51 to 0.72 0.40 0.54 to 0.72 Wood, dry, spruce 25 0.40 Wood, dry, sycamore Wood, dry, walnut, black 37 0.59 38 0.61 Zinc 438 0.2528 7.01 σ Search 12 يا Limits Tolerance F10-2.pc X Weight conversions X Calculating Weight-1.pdf x Preferred -1.pdf - + L 2 of 3 CD c. Since each cubic foot of cast iron weighs 450 lb, we multiply by 450, giving 1,181 lb. Problems 9-18 Find the weight of the following. Use Table 7 in the back of this text. 1. Find the weight of a rectangular steel plate 3'3" x 2'1" and " thick. 2. Find the weight of a 20' length of wrought-iron pipe whose inside diameter is 3.548" and outside diameter 4". 3. Find the weight of 1,000 round U.S. Standard wrought-iron washers whose outside diameter is 3", with a 13" hole and a thickness of ". 4. Find the weight of 500 wrought-iron washers 5" square and " thick. The hole is 1" in diameter. 5. Find the weight of a cast-iron manhole cover with semicircular ends if the overall length is 4'2", the width 2'1", and the thickness 1". 6. Find the weight of a triangular steel plate 8" on a side and 1" thick. 7. Find the weight of a steel ball 3" in diameter. 8. Find the weight of 500 steel bearings 1" in diameter. 9. Find the weight of 1,000 lead discs " in diameter and " thick. 10. Find the weight of a 4' length of cast-iron pipe whose inside diameter is 3" and whose outside diameter is 4". Aluminum Table 7 Weights of Materials Average Weight in Pounds Material Per Cubic Foot Per Cubic Inch Average Weight in Grains per Cm³ 160--> 512- 0.0924 0.2960 2.56 8.20 2.40