Airplanes and chemical warfare were technological advances during world war 1.
The equilibrium is the price that comes out from adding all the direct related costs in producing the good or service. To this total you have to add the indirect costs, for example, taxes, salaries, etc. Add up both results and you will have the price.
The equilibrium price is the price that covers all your expenses, both direct and indirect. With this price you do not lose nor earn any money.
The answer to this question is : <span>General Assembly, Constitutional Convention, Initiative</span>
