QUES: The highest point of a wave is the crest. The lowest point is the trough. The vertical distance between a crest and a trough is the height of the wave. Wave height is also called amplitude. The horizontal distance between two crests is the wavelength. Both amplitude and wavelength are measures of wave size. The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be. Some of the biggest waves occur with hurricanes. A hurricane is a storm that forms over the ocean. Its winds may blow more than 150 miles per hour! The winds also travel over long distances and may last for many days.
Do you have any questions?
MY QUESTION: How are the lowest and highest points of a wave related to its amplitude?

QUES: The opening shot of the movie shows Kunti praying for Lord Krishna's protection for the Pandavas . Lord Krishna consoles Kunti and promises to ever protect the Pandavas and guide them through troubles and problems that may occur in life . The sons of Pandu and Dhritarashtra progeny break into an argument . When Duryodhana insults the Pandavas as '' dependents '' , Bheema counters by saying that , the Kauravas are the progeny of a widow . Duryodhana asks Veda Vyasa for an explanation . He is then told that , since his mother , Gandhari had an astrological defect , she is first married of to a goat and then married to his father . Duryodhana gains animosity towards the kingdom of Gandhara where the king , the father of his mother Gandhari , rules . He attacks Gandhara and lays waste of the whole kingdom . He them imprisons the royal family in his prison . He gives them only one rice grain per prisoner . The king of Gandhara then stops everyone from grabbing the little food that is provided . He says that instead of everyone dying , they could keep at least one of their princes alive . He chooses Sakuni to be alive . Sakuni takes an oath that he will do everything he can to destroy the entire Kaurava clan . He makes magic dice from his father's spinal cord . The magic dice show exactly the number that he would want . Duryodhana takes pity on the lone prisoner , Sakuni after the rest of the Gandhara royal family dies in prison out of starvation . Sakuni joins the evil of coterie of Duryodhana , Karna and Dushyasana .
Do you have any questions?
MY QUESTION: Why does Duryodhana attack Gandhara?

QUES: Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.
Do you have any questions?
MY QUESTION: Name two benefits of Earths magnetic field.

QUES: At 8:38, Ong told Gonzalez that the plane was flying erratically again. Around this time Sweeney told Woodward that the hijackers were Middle Easterners, naming three of their seat numbers. One spoke very little English and one spoke excellent English. The hijackers had gained entry to the cockpit, and she did not know how. The aircraft was in a rapid descent. At 8:41, Sweeney told Woodward that passengers in coach were under the impression that there was a routine medical emergency in first class. Other flight attendants were busy at duties such as getting medical supplies while Ong and Sweeney were reporting the events. At 8:41, in American's operations center, a colleague told Marquis that the air traffic controllers declared Flight 11 a hijacking and "think he's [American 11] headed toward Kennedy [airport in New York City]. They're moving everybody out of the way. They seem to have him on a primary radar. They seem to think that he is descending." At 8:44, Gonzalez reported losing phone contact with Ong. About this same time Sweeney reported to Woodward, "Something is wrong. We are in a rapid descent . we are all over the place." Woodward asked Sweeney to look out the window to see if she could determine where they were.
Do you have any questions?
MY QUESTION:
After receiving a report that they were flying erratically again, how long did it take for the ground control to declare flight 11 a hijacking and start clearing out the airport landing area and why did they do this.