An engineer uses aluminum to build an airplane rather than composite materials that are lighter and stronger. He does this because he is concemed
about the composite materials and how suddenly they can fail. This is an
example of
A. choosing a material that will show warning before it fails.
B. using a material for multiple applications,
C. using design techniques that increase efficiency and reduce
costs
D. using composite materials that combine strengths,

A

Explanation:

I would assume A because it says in the problem statement that chooses aluminum because he is worried that composite will suddenly fail... therefore he would use aluminum because it would bend before breaking and therefore show warning.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: