Problem 3: If you are designing a propeller shaft for a ship, use the tables of data shown in Lecture 2 to compare C95400 aluminum bronze versus Ti-6Al-4V titanium alloy in terms of density, strength, machinability, weldability, corrosion, and cost. Problem 4: We can add CaO to Sio glass to disrupt bonding of 20% of the oxygen atoms to weaken the network of Si-O tetrahedra. When we make this addition, each calcium ion will result in 2 'broken oxygen connections. Calculate the weight percent of CaO we should add to SiO, to achieve this. The atomic masses of the elements are: 0-16 amu; Si-28 amu; Ca 40 amu