Problem: Mechanical energy is a combination of the energy of motion or position. This type of energy describes objects that are moving or could move. A moving ball can have energy from motion. An arrow can also have the energy of motion. Both are types of mechanical energy. Can you think of some other examples? Where does the energy of motion come from? It comes from the energy created by position. This energy is stored energy. This means it is not moving yet, but it has the potential to move. How can you store energy? The arrow gains energy from the drawn bow. As the arrow is released, the bow releases its stored energy and puts the arrow into motion. Can you think of some other ways to store energy using position?

Question: "Why is mechanical energy considered a combination of the energy of motion and position?"

Answer: "Because combined forces is always stronger than individuals"

OPTIONS:
- no
- yes
Answer: no

Question:
Alexander earned the epithet "The Great" due to his unparalleled success as a military commander. He never lost a battle, despite typically being outnumbered. This was due to use of terrain, phalanx and cavalry tactics, bold strategy, and the fierce loyalty of his troops. The Macedonian phalanx, armed with the sarissa, a spear 6 metres (20 ft) long, had been developed and perfected by Philip II through rigorous training, and Alexander used its speed and maneuverability to great effect against larger but more disparate Persian forces. Alexander also recognized the potential for disunity among his diverse army, which employed various languages and weapons. He overcame this by being personally involved in battle, in the manner of a Macedonian king. In his first battle in Asia, at Granicus, Alexander used only a small part of his forces, perhaps 13,000 infantry with 5,000 cavalry, against a much larger Persian force of 40,000. Alexander placed the phalanx at the center and cavalry and archers on the wings, so that his line matched the length of the Persian cavalry line, about 3 km (1.86 mi). By contrast, the Persian infantry was stationed behind its cavalry. This ensured that Alexander would not be outflanked, while his phalanx, armed with long pikes, had a considerable advantage over the Persian's scimitars and javelins. Macedonian losses were negligible compared to those of the Persians. At Issus in 333 BC, his first confrontation with Darius, he used the same deployment, and again the central phalanx pushed through. Alexander personally led the charge in the center, routing the opposing army. At the decisive encounter with Darius at Gaugamela, Darius equipped his chariots with scythes on the wheels to break up the phalanx and equipped his cavalry with pikes. Alexander arranged a double phalanx, with the center advancing at an angle, parting when the chariots bore down and then reforming. The advance was successful and broke Darius' center, causing the latter to flee once again. When faced with opponents who used unfamiliar fighting techniques, such as in Central Asia and India, Alexander adapted his forces to his opponents' style. Thus, in Bactria and Sogdiana, Alexander successfully used his javelin throwers and archers to prevent outflanking movements, while massing his cavalry at the center. After reading the above, is "Darius equipped his chariots with scythes on the wheels to break up the phalanx" the correct answer to the question "How did Alexander change the use of the phalanx at the battle of Gaugamela?"? OPTIONS:
- no
- yes

Answer:
yes

Input: Sound waves are mechanical waves. They can travel only through matter. They cannot travel through empty space. This was demonstrated in the 1600s by a scientist named Robert Boyle. Boyle placed a ticking clock in a sealed glass jar. The clock could be heard ticking through the air and glass of the jar. Then Boyle pumped the air out of the jar. The clock was still running, but the ticking could not be heard. Thats because the sound couldnt travel without air particles to transfer the sound energy. Is there any other place where sound cannot be heard? Here is a hint: is there any other place that does not have air molecules? Thats right, in space sound cannot be transferred. So can astronauts hear each other? Yes, they can, because they are in enclosed space stations or pressurized suits.In both cases, they are surrounded by air molecules. If they left their space ship and did not use their electronics, they would not be able to hear each other. Next time you watch a science fiction movie, think about this factoid. When spaceships are destroyed by hostile alien beings, there would be no sound heard. Sound waves can travel through many kinds of matter.
"How did Robert Boyle prove how sound waves travel?" is "an explosion under water"?

OPTIONS:
- no
- yes
Output: no

Input: (CNN) -- Deposed Honduran President Jose Manuel Zelaya will not be reinstated as head of state, an overwhelming majority of the Honduran congress voted Wednesday. In an hours-long process, 111 lawmakers voted in favor of a motion not to return Zelaya to office. A majority of 65 votes in the 128-member body was required to reject his reinstatement. Zelaya was removed from office in a military-led coup on June 28 and replaced by congressional leader Roberto Micheletti. On Wednesday, lawmakers voted one by one and addressed the chamber as they cast their vote, making for a slow process. The vote was a key part of a U.S.-brokered pact that representatives for Zelaya and Micheletti signed October 29, giving Congress the power to decide Zelaya's fate. The United States expressed disappointment Thursday over the latest rebuff to its diplomatic efforts to end the political crisis in Honduras. U.S. Assistant Secretary of State for Western Hemisphere Affairs Arturo Valenzuela continued to call on the Honduran government to allow Zelaya's return and to create a unity government in the interim period before the new president takes office next month. "We are disappointed by this decision since the United States had hoped the [Honduran] Congress would have approved his return," Valenzuela said in a conference call with journalists in Washington. "Our policy since June 28 has been consistently principled. It has condemned the coup d'etat and continued to accept President Zelaya as the democratically elected and legitimate leader of Honduras throughout this political crisis." The United States continues to call for Honduras to engage in national reconciliation and creation of a truth commission to investigate the crisis, in addition to the unity government. "The absence of democratic, constitutional order is the unacceptable status quo," a senior U.S. administration official said on the conference call, remaining anonymous under the ground rules of the call and because of the sensitivity of the situation. "The election is a step toward a day where Honduras will have an electorally legitimate government in place."

Does the response "June 30" correctly answer the question "When did the coup d'etat that ousted President Zelaya occur?"?

OPTIONS:
- no
- yes
***
Output: no

Input: An atom is the very smallest particle that still the elements properties. All the atoms of an element are alike. They are also different from the atoms of all other elements. For example, atoms of gold are always the same. It does not matter if they are found in a gold nugget or a gold ring. All gold atoms have the same structure and properties. For example, all gold atoms contain 79 protons. One of golds unique properties is that it is a great conductor of electricity. Gold is a better conductor of electricity than copper. Gold is more rare and expensive than copper. Copper is used in house wiring. Gold is far too expensive.
"How is gold different from copper?" is "Gold is cheaper"?

OPTIONS:
- no
- yes
Output:
no