The correct answer is this one: "b. (Cowan and Duncan, 2000)." Cowan, Gary, and Roy Duncan. Helicopters. New York: Random House, 2000. This paper should be cited, following the American Psychology Association Citation structure, in this way: (Cowan and Duncan, 2000).
<span>The law of conservation of energy states that energy can change from one form into another, but it cannot be created or destroyed. Or the general definition is: The totalenergy of an isolated system remains constant over time. ... A device that demonstrates the Law of Conservation of Mechanical Energy and Momentum.</span>
The correct answer is letter A.
Explanation: After having their forces slaughtered by the Romans, the leaders of the Carthaginian empire decided to reinforce their war contingent by promoting the mining of the Iberian Peninsula. Concerned about the relentless military reaction of the Carthaginians, the Romans attempted to send a diplomatic mission that should claim to limit the influence of the Carthaginians in that region. By Carthage's refusal, the Romans were ready to battle.
This was called the "Iron Curtain" given it's name by Winston Churchill.
