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.

Question: "What can sound waves move through?"

OPTIONS:
- no
- yes

Answer: "Water"

Response: yes

Recommendation: Congressional oversight for intelligence-and counterterrorism-is now dysfunctional. Congress should address this problem. We have considered various alternatives: A joint committee on the old model of the Joint Committee on Atomic Energy is one. A single committee in each house of Congress, combining authorizing and appropriating authorities, is another. The new committee or committees should conduct continuing studies of the activities of the intelligence agencies and report problems relating to the development and use of intelligence to all members of the House and Senate. We have already recommended that the total level of funding for intelligence be made public, and that the national intelligence program be appropriated to the National Intelligence Director, not to the secretary of defense. We also recommend that the intelligence committee should have a subcommittee specifically dedicated to oversight, freed from the consuming responsibility of working on the budget. The resolution creating the new intelligence committee structure should grant subpoena authority to the committee or committees. The majority party's representation on this committee should never exceed the minority's representation by more than one. Four of the members appointed to this committee or committees should be a member who also serves on each of the following additional committees: Armed Services, Judiciary, Foreign Affairs, and the Defense Appropriations subcommittee. In this way the other major congressional interests can be brought together in the new committee's work. Members should serve indefinitely on the intelligence committees, without set terms, thereby letting them accumulate expertise. The committees should be smaller-perhaps seven or nine members in each house-so that each member feels a greater sense of responsibility, and accountability, for the quality of the committee's work. The leaders of the Department of Homeland Security now appear before 88 committees and subcommittees of Congress. One expert witness (not a member of the administration) told us that this is perhaps the single largest obstacle impeding the department's successful development. The one attempt to consolidate such committee authority, the House Select Committee on Homeland Security, may be eliminated. The Senate does not have even this. Congress needs to establish for the Department of Homeland Security the kind of clear authority and responsibility that exist to enable the Justice Department to deal with crime and the Defense Department to deal with threats to national security.

Question: "What are some of the problems Homeland Security faces right now?"

Response: "Insuffient funding"
OPTIONS:
- no
- yes

A: no

Problem: But I think it is certain that most of the early Christians understood these words of our Lord's ascension and coming again in glory. They believed that He was coming again in a very little while during their own life-time, in a few months or years, to make an end of the world and to judge the quick and the dead. And as they waited for His coming, one generation after another, and yet He did not come, a sadness fell upon them. Christ seemed to have left the world. The little while that He had promised to be away seemed to have become a very long while. Hundreds of years passed, and yet Christ did not come in glory. And, as I said, a sadness fell on all the Church. Surely, they said, this is the time of which Christ said we were to weep and lament till we saw Him again--this is the time of which He said that the bridegroom should be taken from us, and we should fast in those days. And they did fast, and weep, and lament; and their religion became a very sad and melancholy one--most sad in those who were most holy, and loved their Lord best, and longed most for His coming in glory.

Question: "Why did Christ seem to have left the world?"

Answer: "After hundreds of years passed, Christ did not return"

OPTIONS:
- no
- yes
Answer: yes

He repeatedly calls on his followers to embrace martyrdom since "The walls of oppression and humiliation cannot be demolished except in a rain of bullets." For those yearning for a lost sense of order in an older, more tranquil world, he offers his "Caliphate" as an imagined alternative to today's uncertainty. For others, he offers simplistic conspiracies to explain their world. Bin Laden also relies heavily on the Egyptian writer Sayyid Qutb. A member of the Muslim Brotherhood executed in 1966 on charges of attempting to overthrow the government, Qutb mixed Islamic scholarship with a very superficial acquaintance with Western history and thought. Sent by the Egyptian government to study in the United States in the late 1940s, Qutb returned with an enormous loathing of Western society and history. He dismissed Western achievements as entirely material, arguing that Western society possesses "nothing that will satisfy its own conscience and justify its existence." Three basic themes emerge from Qutb's writings. First, he claimed that the world was beset with barbarism, licentiousness, and unbelief (a condition he called jahiliyya, the religious term for the period of ignorance prior to the revelations given to the Prophet Mohammed). Qutb argued that humans can choose only between Islam and jahiliyya. Second, he warned that more people, including Muslims, were attracted to jahiliyya and its material comforts than to his view of Islam; jahiliyya could therefore triumph over Islam. Third, no middle ground exists in what Qutb conceived as a struggle between God and Satan. All Muslims-as he defined them-therefore must take up arms in this fight. Any Muslim who rejects his ideas is just one more nonbeliever worthy of destruction. Bin Laden shares Qutb's stark view, permitting him and his followers to rationalize even unprovoked mass murder as righteous defense of an embattled faith. Many Americans have wondered, "Why do 'they' hate us?" Some also ask, "What can we do to stop these attacks?" Bin Laden and al Qaeda have given answers to both these questions.

Question: "Who warned that jahiliyya could therefore triumph over Islam?"

OPTIONS:
- no
- yes

Answer: "Bin Laden"

Response:
no