Write balanced molecular and net ionic equations for the reaction that occurs when
each of the following is added to a perchloric acid solution.
a) a barium hydroxide solution
b) solid barium sulfate
c) aluminum metal
In: Chemistry
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.60 m/s at an angle of 15.0
In: Physics
|
Current Year |
Previous Year |
Growth Rate |
|
|
Real GDP |
$8.4 trillion |
$8.0 trillion |
|
|
Population |
202 million |
200 million |
|
|
GDP per Capita |
1A. Calculate GDP per Capita for the current year and previous
year.
1B. What is the annual growth rate of GDP per Capita? How do you
find it?
1C. How do real GDP growth and population growth affect GDP per
capita growth?
1D. Using your calculated figure in (1B), calculate the amount of
GDP per capita (future value) after 18 years.
1E. Using the rule of 72, calculate how many years GDP per capita
will be double.
72/growth rate = number of years to double the actual
value
In: Economics
Describe the hubs and spokes model of semantic memory. Why are lesions in the premotor/motor cortices more likely to produce categorical deficits for tools than animals? Why do lesions in the anterior temporal lobe produce deficits for a wider range of concepts?
In: Anatomy and Physiology
Describe rotameter-type flowmeters, explain how they work, and compare them with
Venturi flowmeters
In: Physics
Bruins Inc. has the following items in their current
balance sheet:
Common Stock 10,000,000 shares authorized, $1,000,000 issued -
$3,000,000
Capital Surplus - $9,000,000
Treasury Stock on Common 100,000 shares -
$6,000,000
Cumulative Preferred Stock 500,000 authorized
[2%] $100 par - $8,000,000
Treasury Stock on Preferred Stock 10000 shares - $6,000,000
Retained Earnings - $60,000,000
In: Accounting
A 54.1 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu).
1. If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are produced by this sample?
The half-life of chlorine-36 is 3.0×105 yr.
In: Chemistry
Oranges are very susceptible to cold weather, and long exposure to subfreezing temperatures can destroy them. Consider an 8 cm diameter orange (assume it is an idealised sphere) that is initially at 15oC. A cold front moves in one night, and the ambient temperature suddenly drops to -8.5oC, with a heat transfer coefficient of 7 W m-2 K−1 . Using the properties of water for the orange and assuming the ambient conditions to remain constant for 2.5 hours before the cold front moves out, determine temperatures at: ro = 0.0 cm (i.e., centre of the orange); ro = 1.0 cm; ro = 2.0 cm; ro = 3.0 cm; ro = 4.0 cm
In: Other
Assume that a disk has an average seek time of 9 msec and a rotation speed of 7000 RPM. Assume also that there are 40 sectors in a track. What is the average time expected to retrieve a single sector?
In: Computer Science
At a fixed temperature, equal moles of N2 (g) and F2 (g) are mixed in a constant pressure container (the volume of the container changes in order to keep the pressure at a constant value). The N2 (g) and F2 (g) are allowed to react, producing NF3 (g):
N2 (g) + 3F2 (g) ? 2 NF3 (g)
If the initial volume of the container, before any reaction takes place, is 4.10 L, determine the volume of the container after the N2 (g) and F2 (g) have reacted to completion.
The final volume will be L
In: Chemistry
Jeremy and Alyssa Johnson have been married for five years and do not have any children. Jeremy was married previously and has one child from the prior marriage. He is self-employed and operates his own computer repair store. For the first two months of the year, Alyssa worked for Office Depot as an employee. In March, Alyssa accepted a new job with Super Toys Inc. (ST), where she worked for the remainder of the year. This year, the Johnsons received $273,000 of gross income.
Determine the Johnson's AGI given the above information:
In: Accounting
Jackson County Senior Services is a nonprofit organization devoted to providing essential services to seniors who live in their own homes within the Jackson County area. Three services are provided for seniors—home nursing, Meals On Wheels, and housekeeping. Data on revenue and expenses for the past year follow:
| Total | Home Nursing | Meals On Wheels | House- keeping |
|||||
| Revenues | $ | 917,000 | $ | 263,000 | $ | 401,000 | $ | 253,000 |
| Variable expenses | 471,000 | 113,000 | 204,000 | 154,000 | ||||
| Contribution margin | 446,000 | 150,000 | 197,000 | 99,000 | ||||
| Fixed expenses: | ||||||||
| Depreciation | 70,700 | 8,900 | 40,900 | 20,900 | ||||
| Liability insurance | 43,800 | 20,500 | 8,000 | 15,300 | ||||
| Program administrators’ salaries | 115,300 | 40,300 | 38,800 | 36,200 | ||||
| General administrative overhead* | 183,400 | 52,600 | 80,200 | 50,600 | ||||
| Total fixed expenses | 413,200 | 122,300 | 167,900 | 123,000 | ||||
| Net operating income (loss) | $ | 32,800 | $ | 27,700 | $ | 29,100 | $ | (24,000) |
*Allocated on the basis of program revenues.
The head administrator of Jackson County Senior Services, Judith Miyama, considers last year’s net operating income of $32,800 to be unsatisfactory; therefore, she is considering the possibility of discontinuing the housekeeping program.
The depreciation in housekeeping is for a small van that is used to carry the housekeepers and their equipment from job to job. If the program were discontinued, the van would be donated to a charitable organization. None of the general administrative overhead would be avoided if the housekeeping program were dropped, but the liability insurance and the salary of the program administrator would be avoided.
Required:
1-a. What is the financial advantage (disadvantage) of discontinuing the Housekeeping program?
1-b. Should the Housekeeping program be discontinued?
2-a. Prepare a properly formatted segmented income statement.
2-b. Would a segmented income statement format be more useful to management in assessing the long-run financial viability of the various services?
In: Accounting
Two balls (solid spheres) have the same radius and the same rotational kinetic energy. If the ratio of their masses is
| m1 |
| m2 |
=
| 4 |
| 1 |
, what is the ratio of their angular velocities?
In: Physics
Researchers Try to Save Some Middle-Eastern Languages From Extinct
Language is arguably the most universally important of human abilities, making it possible to pass on information and experiences like a baton through generations.
But about half of the 7,000 languages spoken around the world will not last the end of this century, according to the latest predictions. There is no single cause for the extinction of a language. Some of the common causes are the overbearing dominance of a few languages, such as Arabic, French and English, the social stigmas attached to using minority languages and the disruption of traditional ways of life.
Linguists argue that it’s in the interest of humankind to save the languages that are at risk. “The loss of a language can also mean the loss of an entire culture,” says the director of the Endangered Languages Documentation Programme at SOAS, University of London, Mandana Seyfeddinipur. She adds that there could be remedies to diseases that might never be passed on because after the last speaker dies, no one could understand any texts they left behind. “When a language dies then we’ll never know what those people knew,” she says.
Linguists say the ethnic violence directed at minorities in Iraq and Syria has placed additional strains on endangered languages. “It’s almost in the definition of an endangered language that it be spoken by a minority and right now and in parts of the Middle East they’re either being killed or suppressed,” says director of the Endangered Languages Project, Lyle Campbell. Some of those Middle Eastern languages at risk are expected to be extinct in 60 years.
The most endangered language in the Middle East, according to Campbell, is currently a dialect of Northeastern Neo-Aramaic found in Mosul and the Nineveh Plains region of Iraq. There are about 2,000 speakers who have suffered greatly at the hands of the Islamic State, says Campbell. The dialect has its roots in Aramaic, once a widely spoken language that some experts believe was spoken by Jesus and the region’s rulers.
A small population of native speakers doesn’t necessarily mean a language is on the brink of extinction. Campbell’s organization categorizes the vast number of endangered languages into four sub-groups: at risk, endangered, severely endangered and “vitality unknown.”
In addition to the number of speakers, researchers also consider whether the population is on the rise or fall and whether the younger generation is engaged with the mother tongue. Campbell admits this is not as yet an exact science because the amount of data is severely limited: “It’s often a best guess, but the really endangered ones pop out at you.”
Languages in the Middle East with less than 20,000 speakers(The Endangered Languages Project)
Relatively speaking, the Arab world is not one of the most linguistically diverse parts of the globe. “Arabic has wiped through the region over the years and swept up the smaller languages,” says Seyfeddinipur.
It’s an uphill struggle to preserve what’s left. “We’re fighting a battle against time,” she says.
Her colleagues agree. “You have the big languages in the Middle East; Arabic, Turkish and Kurdish, but not much else,” says Bruno Herin, a linguist from the Institut National des Langues et Civilisations Orientales, in Paris.
Some governments in the region give Arabic more official status than the minority languages. In Saudi Arabia only Arabic is officially recognized. “We have to pretend that other languages there are Arabic dialects if we want to go and study them,” says Campbell.
Herin is documenting the endangered Domari language in Lebanon with the support of a grant from Seyfeddinipur’s department. The people who speak Domari, known as the Dom, are branded as the “gypsies of the Middle East,” says Herin. “There’s a big stigma attached to the term,” he says, “so they try to keep themselves hidden.” The Dom have no ethnic or linguistic relation to Europe’s Roma populations.
The effort of Dom communities to be invisible makes it impossible to know exactly how many Domari speakers there are. Herin estimates they’re in the thousands, not the hundreds.
In 2009, before the Syrian conflict began, Herin was visiting a friend in Aleppo. He overhead his friend’s cleaning lady speaking on the phone with a family member. Unable to recognize her apparent dialect of Arabic, he spoke to the maid and enquired further. She explained that she was speaking Domari, not Arabic and that’s when he first became interested in the Dom. “Someone from outside of the region might easily mistake it for Arabic. The Dom have borrowed a lot of speech patterns from Arabs over the years,” says Herin.
Domari is an Indic language, originating in the Indian subcontinent. At some point in their history, the Dom migrated from South Asia to the Middle East. Ever since, they have traditionally been merchant nomads, says Herin.
Today, there are Dom populations in western Syria, Lebanon and southern Turkey. Since the civil war in Syria began, they’ve been the victims of violence from various fighting factions, says Herin. “They’re perceived as unbelievers by some rebels,” he says. “They aren’t seen as good Muslims despite identifying themselves as Sunni.” That discrimination has pushed the Dom to migrate to Lebanon and Turkey.
When minorities become refugees, it’s never a good thing for the survival of their language, says Seyfeddinipur. The separation from their homeland and disruption of their traditions often means the younger generations take more interest in the language of their adopted country. This certainly seems to be the case with Domari. “The Dom youth prefer Arabic—the youngest speakers of Domari are 30 years old,” says Herin. He gives the Domari language 60 years to become extinct.
To make matters worse, the language has no written form. “When the last Domari speaker dies, it will be as though the language never was. That’s why I’m intervening,” says Herin.
Saving a language from extinction involves a two-pronged attack: The first prong is to document and describe the language so that future linguists can study it and future generations can learn it. The second prong is revitalization, which seeks to increase the number of speakers. That is considerably harder because it means researchers have to provide a cultural and social context for communities to be bilingual. Success rates are historically low, says Seyfeddinipur.
Campbell also recognizes the odds, but looks to previous successes for inspiration. “We are seeing more and more language obituaries,” he says. “But Welsh in the U.K. is considered a great success story and proves it can be done.”
Herin is preparing for a trip to Lebanon in early 2015 where he will consult with Domari speakers. He hopes to come up with a way to codify the language in writing, which he hopes will lay the foundation for the language to thrive again. “The Dom would probably prefer an Arabic script to a Latin alphabet,” he says. “That’s the best solution because they’ll be able to apply their Arabic literacy.”
He also hopes to encourage the Dom to teach the language to their younger generations with the production of formal grammar and a multimedia dictionary.
Faced with the grim statistic that some 3,500 languages all over the world are expected to bite the dust over the next 90 or so years, Seyfeddinipur insists it’s worth the effort preserve dying languages even if native speakers are unlikely to embrace them again. “The way we speak shapes the way with think. When a language dies we loose a community’s collective wisdom,” she says, “Why is the British Museum important? Why is The Smithsonian important?”
i need summry
In: Psychology