Question:
What if two children push a swing at the same time? Would the swing go higher? Yes, together their force would be more. It is common for forces to be combined. Most objects on Earth have at least two forces acting on them. Do you know what one of them is? Of course, that force is gravity. How many forces do you have on you right now? Gravity pulls you down toward the center of Earth. Your legs exert a downward force. They hold you up against the pull of gravity. Consider the example in Figure 1.3. A book is resting on a table. Gravity pulls the book downward. It has a force of 20 newtons. At the same time, the table pushes the book upward. Its force is also 20 newtons. The table opposes the pull of gravity. After reading the above, is "Gravity" the correct answer to the question "Which forces affect a book resting on a table?"? OPTIONS:
- no
- yes

Answer:
yes

Question:
These contradictory orders, and even letters of recall, reached Law on his march, but though he sent back M. Sinfray with letters to M. Bugros and Coja Wajid--which the latter afterwards made over to Clive--he continued his march to Patna, where he arrived on the 3rd of June, and was well received by Raja Ramnarain, and where he was within four or five days' march or sail from Sooty, the mouth of the Murshidabad or Cossimbazar river, and therefore in a position to join the Nawab whenever it might be necessary. In the mean time fate had avenged Law on one of his lesser enemies. This was that Ranjit Rai, who had insulted him during his interview with the Seths. The latter had pursued their old policy of inciting the English to make extravagant demands which they at the same time urged the Nawab to refuse. To justify one such demand, the English produced a letter in the handwriting of Ranjit Rai, purporting to be written at the dictation of the Seths under instructions from the Nawab. The latter denied the instructions, and the Seths promptly asserted that the whole letter was a forgery of their agent's. After reading the above, is "Inciting of the English to make extravagant demands" the correct answer to the question "What did the letter pursue?"? OPTIONS:
- no
- yes

Answer:
yes

Question:
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] After reading the above, is "Weight changes with the force of gravity" the correct answer to the question "How do mass and weight differ?"? OPTIONS:
- no
- yes

Answer:
yes

Question:
Clarifying the Record The defense of U.S. airspace on 9/11 was not conducted in accord with preexisting training and protocols. It was improvised by civilians who had never handled a hijacked aircraft that attempted to disappear, and by a military unprepared for the transformation of commercial aircraft into weapons of mass destruction. As it turned out, the NEADS air defenders had nine minutes' notice on the first hijacked plane, no advance notice on the second, no advance notice on the third, and no advance notice on the fourth. We do not believe that the true picture of that morning reflects discredit on the operational personnel at NEADS or FAA facilities. NEADS commanders and officers actively sought out information, and made the best judgments they could on the basis of what they knew. Individual FAA controllers, facility managers, and Command Center managers thought outside the box in recommending a nationwide alert, in ground-stopping local traffic, and, ultimately, in deciding to land all aircraft and executing that unprecedented order flawlessly. More than the actual events, inaccurate government accounts of those events made it appear that the military was notified in time to respond to two of the hijackings, raising questions about the adequacy of the response. Those accounts had the effect of deflecting questions about the military's capacity to obtain timely and accurate information from its own sources. In addition, they overstated the FAA's ability to provide the military with timely and useful information that morning. In public testimony before this Commission in May 2003, NORAD officials stated that at 9:16, NEADS received hijack notification of United 93 from the FAA. This statement was incorrect. There was no hijack to report at 9:16. United 93 was proceeding normally at that time. In this same public testimony, NORAD officials stated that at 9:24, NEADS received notification of the hijacking of American 77. This statement was also incorrect. The notice NEADS received at 9:24 was that American 11 had not hit the World Trade Center and was heading for Washington, D.C. In their testimony and in other public accounts, NORAD officials also stated that the Langley fighters were scrambled to respond to the notifications about American 77,178 United 93, or both. These statements were incorrect as well. The fighters were scrambled because of the report that American 11 was heading south, as is clear not just from taped conversations at NEADS but also from taped conversations at FAA centers; contemporaneous logs compiled at NEADS, Continental Region headquarters, and NORAD; and other records. After reading the above, is "9" the correct answer to the question "Who handled the U.S. air defense on 9/11?"? OPTIONS:
- no
- yes

Answer:
no