How many atoms are there in 8.97 grams of lead (Pb) A. 1.12 x 10^27
B. 0.0433
C. 5.40 x 10^24
D. 2.61 x 10^22

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost