QUES: 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.
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MY QUESTION: How did Robert Boyle prove how sound waves travel?

QUES: After the death of Spitamenes and his marriage to Roxana (Roshanak in Bactrian) to cement relations with his new satrapies, Alexander turned to the Indian subcontinent. He invited the chieftains of the former satrapy of Gandhara, in the north of what is now Pakistan, to come to him and submit to his authority. Omphis(Indian name Ambhi Kumar), the ruler of Taxila, whose kingdom extended from the Indus to the Hydaspes (Jhelum), complied, but the chieftains of some hill clans, including the Aspasioi and Assakenoi sections of the Kambojas (known in Indian texts also as Ashvayanas and Ashvakayanas), refused to submit. Ambhi hastened to relieve Alexander of his apprehension and met him with valuable presents, placing himself and all his forces at his disposal. Alexander not only returned Ambhi his title and the gifts but he also presented him with a wardrobe of "Persian robes, gold and silver ornaments, 30 horses and 1000 talents in gold". Alexander was emboldened to divide his forces, and Ambhi assisted Hephaestion and Perdiccas in constructing a bridge over the Indus where it bends at Hund (Fox 1973), supplied their troops with provisions, and received Alexander himself, and his whole army, in his capital city of Taxila, with every demonstration of friendship and the most liberal hospitality. On the subsequent advance of the Macedonian king, Taxiles accompanied him with a force of 5000 men and took part in the battle of the Hydaspes River. After that victory he was sent by Alexander in pursuit of Porus, to whom he was charged to offer favourable terms, but narrowly escaped losing his life at the hands of his old enemy. Subsequently, however, the two rivals were reconciled by the personal mediation of Alexander; and Taxiles, after having contributed zealously to the equipment of the fleet on the Hydaspes, was entrusted by the king with the government of the whole territory between that river and the Indus. A considerable accession of power was granted him after the death of Philip, son of Machatas; and he was allowed to retain his authority at the death of Alexander himself (323 BC), as well as in the subsequent partition of the provinces at Triparadisus, 321 BC. In the winter of 327/326 BC, Alexander personally led a campaign against these clans; the Aspasioi of Kunar valleys, the Guraeans of the Guraeus valley, and the Assakenoi of the Swat and Buner valleys. A fierce contest ensued with the Aspasioi in which Alexander was wounded in the shoulder by a dart, but eventually the Aspasioi lost. Alexander then faced the Assakenoi, who fought in the strongholds of Massaga, Ora and Aornos. The fort of Massaga was reduced only after days of bloody fighting, in which Alexander was wounded seriously in the ankle. According to Curtius, "Not only did Alexander slaughter the entire population of Massaga, but also did he reduce its buildings to rubble". A similar slaughter followed at Ora. In the aftermath of Massaga and Ora, numerous Assakenians fled to the fortress of Aornos. Alexander followed close behind and captured the strategic hill-fort after four bloody days.
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MY QUESTION: What did Alexander do following the death of his wife Roxana?

QUES: Renewable Energy Resource Sunlight Sunlight can be used to heat homes. It can also be used to produce electricity. This conversion is made possible by solar cells. However, solar energy may not always be practical. Some areas are just too cloudy. Example Solar panels on the roof of this house generate enough electricity to supply a familys needs. Moving Water Falling water can have a lot of energy. Its energy can be converted into kinetic energy. This energy can turn a turbine and generate electricity. The water may fall naturally over a waterfall or flow through a dam. A drawback of dams is that they flood land upstream. They can also reduce water flow downstream. Either effect may harm ecosystems. Wind Wind is moving air. It has kinetic energy that can do work. Wind turbines change the kinetic energy of the wind to electrical energy. Only certain areas of the world get enough steady wind. Many people also think that wind turbines are noisy and not very nice to look at.
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MY QUESTION: What are 2 things that limit the use of wind turbines

QUES: The Legal Services Corp. (LSC), a quasi-governmental agency that provides legal aid for the poor, would receive $329 million in fiscal 2004 under President Bush's proposal - the same amount requested in 2003 and approved for 2002 and 2001. If approved, the hold-the-line request for LSC means its budget would erode with inflation for another year, but it could be worse for the organization: Many conservatives fought for years to do away with the LSC altogether, saying legal services attorneys were spending too much time fighting for liberal causes or pursuing politically charged cases against the government instead of representing the needy. Opposition to the organization has cooled since 1996, when Congress approved restrictions (PL 104-134) on the sorts of cases federally funded legal aid attorneys can take. (1996 Almanac, p. 5-36) Republicans cut the organization's budget deeply in 1996, but its funding has recovered slowly. Last month, in the omnibus spending bill for fiscal 2003, the Senate added a onetime increase of $19 million, which, if approved in the final version, would bring the LSC budget to $348 million. The money would go to help states, such as Michigan and Ohio, that lost money when the organization redistributed its funding based on census counts made in 2000 of poor households. If the extra money survives a conference with the House and makes it to the president's desk, LSC supporters may try to include it in the organization's fiscal 2004 funding. The federal government began funding some programs to provide legal assistance to the poor in the late 1960s; the Legal Services Corporation was created in 1974 (PL 93-355). LSC gives nearly all its money to state and local agencies, which provide civil legal assistance to those whose income is less than 125 percent of the federal poverty level - $11,075 a year for an individual and $22,625 for a family of four. Funding for legal services goes to defend needy clients in domestic violence cases, custody cases and other such matters, according to LSC. Since 1996, lawyers who receive money from Legal Services have been prohibited from such activities as lobbying legislatures, filing class-action suits, participating in political demonstrations or strikes, pursuing abortion-related litigation, representing illegal aliens or prisoners, or defending public housing tenants evicted because they were charged with selling drugs
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MY QUESTION:
Republicans cut which organization's budget deeply in 1996?