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: "Which scientist demonstrated that sound waves cannot travel through empty space by placing a ticking clock in a sealed glass jar?"

Response: "Aristotle"
OPTIONS:
- no
- yes

A: no

Problem: Lash is associate dean at the University of Southern California Law School. Johnson is a justice on California's Second District Court of Appeal. Lash and Johnson are co-chairs of the California Commission on Access to Justice. The full report can be viewed at (www.calbar.org). In her year-long odyssey through the California justice system, Katherine, a 35-year-old single mother with three children, experienced failure at every turn. Leaving her abusive husband, she moved into the only apartment she could afford, and soon discovered a broken toilet and non- working oven, rats and roaches, and a fourthfloor landing with no railing. She began withholding rent pending repairs her landlord refused to make, but then her Medi-Cal benefits were cut off when she could not provide rent receipts. She lost health care for her children and herself, although she is a borderline diabetic in need of medication and her children were suffering from rat bites. Katherine tried to seek help through the courts. Representing herself at an administrative hearing, she lost her appeal to restore Medi-Cal benefits because she did not have proper documentation of the rent account. When she went to a courthouse to file a complaint against her landlord, she found the process so confusing that she gave up and went home. According to "The Path to Justice: A Five-Year Status Report on Access to Justice in California," prepared by the California Commission on Access to Justice, Katherine is just one of 4.6 million poor Californians whose basic civil legal needs -- often involving such critical needs as housing, health care, education, employment, safety and transportation -- are not being addressed. California has a critical dearth of legal services for the poor, and, as this report makes clear, it is imperative that the state join with the federal government and private funders to increase resources so that all Californians, regardless of income, have equal access to our justice system. Our justice system is predicated on the assumption that both parties will be represented by lawyers who act as gatekeepers and guides through a complex legal system that would otherwise be inaccessible to many of us. Unfortunately, the most vulnerable members of our society are the least able to afford legal services. California does have a strong network of legal aid organizations that try to help meet the needs of the poor, but there's just one legal aid lawyer available per 10,000 poor people. We may promise "justice for all," but for those who can't afford a lawyer, that promise is often a lie. In its new report, the Commission on Access to Justice notes some significant steps toward providing equal access to justice for all Californians.

Question: "Why did Katherine give up?"

Answer: "She had to go to work"

OPTIONS:
- no
- yes
Answer: no

Question:
Former Long Beach Executive Director Toby Rothschild, now a policy wonk in Iwasaki's outfit, agreed. "To some extent, I did look at it and say, 'We are the littlest kid on the block, and we don't want to get beat up so we need a bigger protector,'" Rothschild said. "Once we got past that, it became a real positive for the Long Beach program and Long Beach clients." But to the San Gabriel-Pomona Valley legal aid program, the positives of merging with Dudovitz's program, San Fernando Valley Neighborhood Legal Services, were never obvious. A meeting in late 1999 between Dudovitz and the San Gabriel-Pomona Valley program's board showed how little the two programs had in common and how difficult bridging the gap between their ideologies would be, Dudovitz recalled. Although no merger plans were discussed, board members at the smaller program knew of Dudovitz's preference for impact litigation over direct services. "We had a discussion about what our separate views were," Dudovitz said. "The message we got was that they wanted their program to stay as it was." Lauralea Saddick, former executive director of the San Gabriel-Pomona Valley program, said her board simply did not share Dudovitz's desire to spend money influencing social policy and participating in high-profile litigation over poverty-related issues. "Our board's philosophy was that the money given by the federal government was to help people with basic everyday needs," Saddick said. "It might take a little bit of humility to take those kinds of cases. Impact work is very important ... but what was the good of getting the law changed if no one is there to help the individual?" Before the San Gabriel program was subsumed by Dudovitz's group, it offered to merge with the Legal Aid Society of Orange County. The boards of both organizations eschewed impact litigation in favor of the 1960s model of providing direct client services. Supported by resolutions from the Pasadena, San Gabriel, Eastern and Foothill bar associations, the two programs drew up plans to merge and submitted them to the Legal Services Corp. Dudovitz won Iwasaki's backing to oppose the deal, and Legal Services Corp., the national funding source, overruled the proposed San Gabriel-Pomona Valley/Orange County merger. On Jan. 27, 2001, the federal agency awarded the San Gabriel-Pomona Valley service area to Dudovitz under the umbrella of an expanded San Fernando program, citing the location of both programs in Los Angeles, which would allow "better coordinated and more effective advocacy on county government policies." The San Gabriel-Pomona Valley program sued Legal Services Corp. to stop the takeover, claiming the federal program based the decision on favoritism for the politically active Dudovitz and the politically powerful Iwasaki. Though the federal suit accomplished little, it effectively suspended the end of the old program and the start of the new one for nearly a year. After reading the above, is "San Gabriel-Ponoma Valley program and Legal Aid Society of Orange County" the correct answer to the question "A meeting in late 1999 showed that which two programs had very little in common?"? OPTIONS:
- no
- yes

Answer:
no

Input: When land is cleared, habitats are lost. It may be cleared for agriculture. It may also be used for building new homes or businesses. Within the past 100 years, the amount of land used for agriculture has almost doubled. Land used for grazing cattle has more than doubled. Many wetlands have also been lost to agriculture. The U.S. has lost almost all the natural tall-grass prairies. Thee areas of tall thick grass have virtually disappeared. These areas of land had thick fertile soil. Their grasses had very deep root systems. These deep and thick roots reduced the amount of soil erosion. They also were home to many plants and animals. Prairies were wonderful places. They were home to colorful flowers, prairie dogs, and herds of bison.

Does the response "A place for animals to graze" correctly answer the question "What are the advantages of tall grass prairies?"?

OPTIONS:
- no
- yes
***
Output:
no