1.Coal has about 5% sulfur. How many pounds of sulphur would be emitted from coal-fired power plants in the united states in 3 years? (each year. U.S electricity production in about 0.28 x 1012 watts, and coal has an energy content of about 30 x 106 J/kg. Note that 1J = 1W-sec). Show all work
2.Why is the torque on A and the torque on AB opposite? Wouldn't they be the same? How do we know which direction the torque is applied at A to begin with? It's not specified.
3.What are the bearings of the sides CD,DE,EA, and AB if the side CB has a bearing S 20° 44’ 36” W, point A is westerly of B and interior angles in each apex are as follows: A = 95° 14’ 23”; E=81° 16’ 54”; D=74° 55’ 19”; C=220° 22’ 22”; B=68° 11’ 02”