If you have a mass of 50 kg on Earth, what is your weight in newtons? An object with more mass is pulled by gravity with greater force. Mass and weight are closely related. However, the weight of an object can change if the force of gravity changes. On Earth, the force of gravity is the same everywhere. So how does the force of gravity change? It doesnt if you stay on Earth. What if we travel to another planet or moon in our solar system? Look at the photo of astronaut Edwin E. Aldrin Jr. taken by fellow astronaut Neil Armstrong in the Figure. They were the first humans to walk on the moon. An astronaut weighs less on the moon than he would on Earth. This is because the moons gravity is weaker than Earths. The astronauts mass, on the other hand, did not change. He still contained the same amount of matter on the moon as he did on Earth. If the astronaut weighed 175 pounds on Earth, he would have weighed only 29 pounds on the moon. If his mass on Earth was 80 kg, what would his mass have been on the moon? [Figure 3]

Question: "Why would a person's weight not change on Earth but it would on the moon?"

OPTIONS:
- no
- yes

Answer: "Because the mass changes on Moon but does not change on Earth"

Response: no

When American 11 struck the World Trade Center at 8:46, no one in the White House or traveling with the President knew that it had been hijacked. While that information circulated within the FAA, we found no evidence that the hijacking was reported to any other agency in Washington before 8:46. Most federal agencies learned about the crash in New York from CNN. Within the FAA, the administrator, Jane Garvey, and her acting deputy, Monte Belger, had not been told of a confirmed hijacking before they learned from television that a plane had crashed. Others in the agency were aware of it, as we explained earlier in this chapter. Inside the National Military Command Center, the deputy director of operations and his assistant began notifying senior Pentagon officials of the incident. At about 9:00, the senior NMCC operations officer reached out to the FAA operations center for information. Although the NMCC was advised of the hijacking of American 11, the scrambling of jets was not discussed. In Sarasota, Florida, the presidential motorcade was arriving at the Emma E. Booker Elementary School, where President Bush was to read to a class and talk about education. White House Chief of Staff Andrew Card told us he was standing with the President outside the classroom when Senior Advisor to the President Karl Rove first informed them that a small, twin-engine plane had crashed into the World Trade Center. The President's reaction was that the incident must have been caused by pilot error. At 8:55, before entering the classroom, the President spoke to National Security Advisor Condoleezza Rice, who was at the White House. She recalled first telling the President it was a twin-engine aircraft-and then a commercial aircraft-that had struck the World Trade Center, adding "that's all we know right now, Mr. President." At the White House, Vice President Dick Cheney had just sat down for a meeting when his assistant told him to turn on his television because a plane had struck the NorthTower of the World Trade Center. The Vice President was wondering "How the hell could a plane hit the World Trade Center" when he saw the second aircraft strike the South Tower. Elsewhere in the White House, a series of 9:00 meetings was about to begin. In the absence of information that the crash was anything other than an accident, the White House staff monitored the news as they went ahead with their regular schedules.

Question: "What was the White House response to the initial reports of the crash?"

Response: "The world trade center"
OPTIONS:
- no
- yes

A: no

Problem: Representing yourself in court can be a tricky endeavor. There are confusing legal terms to learn, strict procedures to follow and volumes of case law that often need to be understood to prepare a case. Lake County officials and a private agency that assists indigent litigants in Illinois want to make the practice easier by creating a self-help center for people who choose to represent themselves in legal matters. The center, which will be housed in the law library at the main courthouse in Waukegan, could open later this summer. "I think it's going to be extremely helpful," Court Administrator Bob Zastany said. "There is a population out there that will take advantage of this resource." The self-help center will be the only one of its kind in the county. Only a few operate nationwide, officials said. The project is the work of Lake County circuit court officials and Prairie State Legal Services, a statewide agency with an office in Waukegan that provides information and legal assistance to poor and elderly Illinois residents. The organization has received a $25,000 grant from the Illinois Equal Justice Foundation, a nonprofit group that funds programs designed to increase access to legal information and assistance, to help pay for the effort. Prairie State will share the money with the county. The county's law library is on the first floor of the governmental center at 18 N. County St. The new self-help center will be designed to help litigants find the information they need to properly represent themselves in court, an undertaking that can be complicated and confusing. "Some people can do OK on their own, and some people can do OK with some help," said Linda Rothnagel, the managing attorney for Prairie State Legal Services. "But other people can't do it. It's not always easy." Self-representation is a right affirmed by the U.S. Supreme Court. The practice is far more common in civil matters than in criminal cases. In fact, self-represented litigants - formally called "pro se" in Latin, or "for oneself" - in criminal defenses are so rare that statistics about the practice generally are not kept, legal experts say.

Question: "Is self representation more common in civil cases or criminal cases?"

Answer: "Criminal cases"

OPTIONS:
- no
- yes
Answer: no

According to the radar reconstruction, American 77 reemerged as a primary target on Indianapolis Center radar scopes at 9:05, east of its last known position. The target remained in Indianapolis Center's airspace for another six minutes, then crossed into the western portion of Washington Center's airspace at 9:10. As Indianapolis Center continued searching for the aircraft, two managers and the controller responsible for American 77 looked to the west and southwest along the flight's projected path, not east-where the aircraft was now heading. Managers did not instruct other controllers at Indianapolis Center to turn on their primary radar coverage to join in the search for American 77. In sum, Indianapolis Center never saw Flight 77 turn around. By the time it reappeared in primary radar coverage, controllers had either stopped looking for the aircraft because they thought it had crashed or were looking toward the west. Although the Command Center learned Flight 77 was missing, neither it nor FAA headquarters issued an all points bulletin to surrounding centers to search for primary radar targets. American 77 traveled undetected for 36 minutes on a course heading due east for Washington, D.C. By 9:25, FAA's Herndon Command Center and FAA headquarters knew two aircraft had crashed into the World Trade Center. They knew American 77 was lost. At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said "we have some planes." Concerns over the safety of other aircraft began to mount. A manager at the Herndon Command Center asked FAA headquarters if they wanted to order a "nationwide ground stop." While this was being discussed by executives at FAA headquarters, the Command Center ordered one at 9:25. The Command Center kept looking for American 77. At 9:21, it advised the Dulles terminal control facility, and Dulles urged its controllers to look for primary targets. At 9:32, they found one. Several of the Dulles controllers "observed a primary radar target tracking eastbound at a high rate of speed" and notified Reagan National Airport. FAA personnel at both Reagan National and Dulles airports notified the Secret Service.

Question: "How long did American 77 stay on the Indianapolis Center Radar?"

OPTIONS:
- no
- yes

Answer: "6 minutes"

Response:
yes