+~üQ >šHHÛ@ÿçÿîÿR#(ü,, ç `,- ^ì&'dAx3xx€LÝ6ÆVz` ÿUNIT 7p2LAB # 5 CROSS-SECTIONAL AREA OF AIR DUCTSÿ pD ÿName ___________________ Period _______ Date _________________ PW ÿProblem: ÿ In this activity, you will find the inside dimensional (ID) area Bfor samples of round, square and rectangular air ducts. You will Dcompare the cross-sectional area of the ducts. The cross-sectional 0Aarea is related to the resistance of the duct to the flow of air. p_ ÿGiven: ÿ  ÿRound Ducts ÿ  ÿSquare Ducts ÿ  ÿRectangle Ducts ÿ0* a. 3 inch ID 5 inch 6 inch by 10 inchpT b.  ÿ ÿ4 inch ID  ÿ ÿ6 inch  ÿ ÿ8 inch by 12 inch ÿpZ c.  ÿ ÿ6 inch ID  ÿ ÿ8 inch ÿ  ÿ ÿ9 inch by 15 inch ÿp] d.  ÿ ÿ10 inch ID  ÿ ÿ10 inch ÿ  ÿ ÿ10 inch by 18 inch ÿpK e.  ÿ ÿ12 inch ID ÿ  ÿ ÿ12 inch ÿ  ÿ ÿ` ÿ`F ÿ ÿ1. Calculate the cross-sectional area of each duct. ÿ`_ ÿ  ÿ ÿRound Ducts ÿ  ÿSquare Ducts ÿ  ÿRectangle Ducts ÿ ÿ  a.  b.  c.  d.  e. `C ÿ2. Make a graph of the diameter against the cross-sectional `' area for the circular ducts. ÿ` ÿ0F3. Can you use your graph to find a diameter or area larger than the 0 measured values? Explain.      0E4. Can you use your graph to find diameter or smaller area than the 0 measured values? Explain. 0  `D ÿ5. Make a graph of the side dimension against cross-sectional`+ area for the square ducts ÿ. ÿ` ÿ076. Compare this graph to the graph for circular ducts. 0How is it similar?0  0How is it different?   €LÝ6ÆVz`L ÿ ÿ7. Make a graph of the side dimension against cross-sectional " area for the rectangle ducts.` ÿ€LÝ6ÆVz`W ÿ ÿ8. Compare this graph to the g ÿraph for the circular and the square 0 ducts. 0How is it similar?0  0How is it different?€LÝ6ÆVzp ÿ€LÝ6ÆVzp ÿ 0 0 0 0