A roll of aluminum foil from the grocery store is 12 inches wide by 75 feet long (if you unroll it). If the foil is o.006 inches thick, and the specific weight of aluminum is 26460/m3, how much does the roll of aluminum foil weigh? O a. 0.036N O b. 4900N c. 142884N O d. 28N

Q1 .Stress apply on polymer sample has 10 cm length, 1 cm width and 2 mm thickness that operates at a constant strain and the elastic modulus is 340000 Psi. The stress drops to 0.850 of the initial stress afther 6 mounts. Calculate the following: a- The initial stress on the sample? b- The elastic modulus afther 12 months?

Consider a fuel cell that uses methane ("natural gas") as fuel. The reaction is                               CH4 + 2O2 → 2H2O + CO2   (a) How much waste heat is produced, for each mole of methane fuel?

Calculate the density for zinc (HCP) if the c/a ratio is 1.856 and r- 1.332 A.