The article “Wind-Uplift Capacity of Residential Wood Roof-Sheathing Panels Retrofitted with Insulating Foam Adhesive” (P. Datin, D. Prevatt, and W. Pang, Journal of Architectural Engineering, 2011:144–154) presents a study of the failure pressures of roof panels.Asample of 15 panels constructed with 8-inch nail spacing on the intermediate framing members had a mean failure pressure of 8.38 kPa with a standard deviation of 0.96 kPa. A sample of 15 panels constructed with 6-inch nail spacing on the intermediate framing members had a mean failure pressure of 9.83 kPa with a standard deviation of 1.02 kPa. Can you conclude that 6-inch spacing provides a higher mean failure pressure?
Day 1 1/4/2016 Mondays 56:30 Sections with the Professor Adriane Steinacker First Homework posted this Friday Lectures are Webcast Login: phys5b Password: Y0ung2sl1t Class Materials: rulers, compass, scientific calculator Yellow is her favorite color 1) Density (mass density) lett rho ρ ρ = mass over volume [ρ] = kg v m3 1 L (Liter) = 100cm 1m3 = 1000L 1 g kg converting 1 cm3= m 3 Assume air is made of Nitrogen molecules N atomic mass z = 7 7 protons and 7 electrons 2 A = 14 so 7p & 7e Mass of proton = 1.67 x 10 27 Mass of neutron = M p MN2 x 14 x 1.67 x 10
