Show Other questions on the subject: EngineeringAplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model. Answers: 3 Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2. Answers: 2 Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t Answers: 3 Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k Answers: 2 Do you know the correct answer? 1. You do not need to remove the lead weights inside tires before recycling them. A) True Questions in other subjects:Mathematics, 20.04.2021 21:50 Biology, 20.04.2021 21:50 Mathematics, 20.04.2021 21:50 Mathematics, 20.04.2021 21:50 Mathematics, 20.04.2021 21:50 Mathematics, 20.04.2021 21:50 Physics, 20.04.2021 21:50 Social Studies, 20.04.2021 21:50 Engineering, 20.04.2021 21:50 Chemistry, 20.04.2021 21:50 Upgrade to remove ads Only ₩37,125/year
Terms in this set (100)Approximately 70% of the world's electronic waste (ewaste) ends up a. in landfills d. shipped to China Critics of recycling are most likely to claim a. It isn't worth
the effort. d. It does make sense to recycle if it costs more than landfilling or incinerating. The United States produces one-half of the world's ewaste and recycles a. none of it e. 10—15% of it Which of the following is not a type of ewaste? a. discarded TV sets b. discarded computer printer paper Waste that includes paper, food wastes, cans, bottles, yard waste, glass, wood, and similar items is called c. municipal solid waste Hazardous waste includes radioactive wastes, which will have to be stored safely for as long as a. 15,000 years d. 240,000 years How much of the waste we mix, crush, and bury could actually be recycled? a. 33% d. 75% With 4.6% of the world's population, the United States produces about _____ of the world's solid
waste. d. one-third For each one pound of electronics in a computer, how much solid and liquid wastes were created? a. 4 tons a. 4 tons Garbage produced directly by households and businesses accounts for _____% of the solid waste produced in the United States. a. less than 2 a. less than 2 The amount of solid waste produced in the United States each year would fill a convoy of garbage trucks stretching around the world almost d. 8 times One way to attempt to deal with the solid wastes we create is to attempt to reduce the environmental impact without trying to reduce the amount of waste produced. This is called a. waste reduction e. waste management The recycling and composting rate of U.S. municipal solid waste is about a. 7% d. 32% ____ percent of the solid waste produced in the United States is buried in landfills. b. Fifty-four In a low-waste approach, which of the following strategies should be given lowest priority? a. incinerate d. bury Taking a refillable coffee cup to the office and using it instead of throwaway cups is an example of __. a. refuse c. reuse Which of the following is the least desirable from an environmental standpoint? a. refuse e. recycle Scientists estimate that in a low-waste society _____ of solid and hazardous waste could be eliminated through reduction, reuse, and recycling. a. 5-10% e. 75-90% All of the following reflect a low-waste approach, except a. extending the useful lifetime for a product c. built-in obsolescence Which is the most advanced approach? a. recycling
materials d. reducing the amount of materials used As a form of waste reduction, reuse does all of the following, except: a. decreases the use of matter resources e. costs money Studies by two soft-drink companies indicate that 21-oz bottles of soft drinks cost _____ in refillable bottles than throw away bottles. a. three times more d. one-third less Environmentalists say that the best way to handle soft-drink and beer containers is to a. use landfills d. use reusable glass bottles How many U.S. states have bottle laws? a. 1 c. 11 _____ has a beverage-container deposit fee that is 50% higher than the cost of the drink, to encourage use of refillable bottles. a. Italy b. Ecuador The most energy-efficient beverage container on the market is a. refillable glass a. refillable glass At the checkout counter, an environmentalist is most likely to a. say "Plastic please." c. say "I brought my own bag." Compost is most accurately described as a. manure d. soil conditioner and organic fertilizer Currently, the United States recycles about _____ of all its wastepaper. a. 16% d. 56% Source separation differs from materials-recovery facilities in all but which of the following? a. It is cheaper. d. It encourages higher throughput of matter. Consumers of recycled products are most effective when they maximize the amount of _____ waste in the products. a. pre-producer d. post-consumer Partially biodegradable plastics need _____ to be broken down. a. light d. cool conditions Which of the following is not true of plastic materials? a. They decompose readily in landfills. a. They decompose readily in landfills. Of the following
materials, the most difficult to recycle is b. plastic Plastic is not recycled at a high rate for all of the following reasons, except e. Health concerns exist about continual use of plastic. In order for an incinerator to be a safe alternative for waste disposal all of the following must be done, except a. Find a use for the heat generated. a. Find a use for the heat generated. Incinerators a. create many low-paying jobs produce toxic substances in fly ash and bottom ash Sanitary landfills typically have problems with a. rodents and insects traffic, noise, and dust The top priority when dealing with hazardous waste should be a. making it less toxic c. pollution prevention and waste reduction All of the following are means of detoxifying hazardous and toxic wastes, except a. phytoremediation b. crushing and grinding Since 1995, Superfund has been primarily funded by a. identified polluters d. taxpayers Which of the following is a disadvantage of using a plasma torch to detoxify hazardous waste? a. mobility c. cost Which of the following methods uses natural or genetically engineered plants to absorb, filter, and remove contaminants from soil and water? a. phytoremediation a. phytoremediation Which of the following is the most common method of storage of hazardous wastes used in most countries of the world? a. burial at sea d. land burial What percentage of liquid hazardous waste in the U.S. is injected into deep disposal wells? a. 34% e. 64% Of the following methods of reducing hazardous wastes, the most desirable is a. incineration b. conversion to less hazardous materials What percentage of the hazardous waste produced in the U.S. is regulated by the Resource Conservation and Recovery Act? a. 5% a. 5% A disproportionate share of polluting factories, hazardous waste dumps, incinerators, and landfills in the U.S. are located in communities populated by all of the following, except a. African Americans c. Caucasians In 1989 an international treaty called the Basel Convention banned developed countries from shipping hazardous waste to developing countries. Which of the following countries has not ratified the treaty? a. Lithuania e. United States Which of the following principles does not contribute to a transition to a low-waste society? a. Economic growth and free markets reduce waste. a. Economic growth and free markets reduce waste. The fastest growing solid waste problem in the U.S. and in the world is ewaste. True True The European Union has an approach to ewaste, known as the cradle-to-grave approach, which requires manufacturers to provide health benefits from cradle-to-grave. True False About 98.5% of all solid waste in the United States is industrial solid waste. True ... Since 1990 the annual production of municipal solid waste has doubled. True false Trash production, by weight, in the city of New York reached its peak between 1920 and 1940. True true Each day the average American produces about 2.0 kilograms (4.5 pounds) of municipal solid waste, three-fourths of which is dumped in landfills. True True Most scientists think that waste management should be the last priority for dealing with material use and solid waste. True True Integrated Waste Management involves combining several different waste management methods into one single strategy. True True Waste reduction is the preferred solution to managing solid wastes because it does not try to avoid the issue of economic growth. True True The ecoindustrial revolution includes the redesign of manufacturing processes to mimic how nature reduces and recycles wastes. True True Reusing products can be a health hazard for the poor in developing countries who dismantle products to extract usable parts. True True Large beverage industries have used their political and financial clout to force most U.S. states to pass bottle bills. True False Plastics are routinely recycled because they are composed of pure resins that can be extracted and used for other plastic products. True False The products of composting can be used to slow soil erosion, retain water, and improve crop yields. True True The incineration of hazardous wastes is quick, conserves space, and reduces waste volume but is not used because of the increased water pollution that results. True False At sanitary landfills, consideration of leachate is of most importance as far as environmental preservation is concerned. True True The National Priorities List identifies hazardous waste sites, with clean up of these sites based on priority and severity. True False The Basal Action Network says that most businesses that call themselves ewaste recyclers take your recycling fee and ship the waste to China, India, or Nigeria. True True Burial or long-term storage of hazardous waste is the first priority for environmental scientists. True False NOPE calls for drastically reducing production of toxic and hazardous wastes by emphasizing pollution prevention and using the precautionary principle. True True No country has yet to institute a ban on persistent organic pollutants. True False The best and cheapest ways to deal with solid and hazardous wastes are waste reduction and pollution prevention. True True __________ is the fastest-growing solid waste problem in the United States and in the world. Ewaste __________ __________ __________ is the combined solid waste produced by homes and workplaces. Municipal solid waste The world's largest landfill, called _________ __________, outside of New York City closed in 2001; it is being turned into a park and nature preserve. Fresh kills The two largest classes of hazardous wastes are __________ and ___________. organic compounds; toxic heavy metals Most analysts call for using __________ __________ __________—a variety of strategies for both waste reduction and waste management. intergrated waste management From an environmental standpoint, the first two Rs, __________ and __________, are better alternatives because they are input or prevention approaches. reduce; reuse In the __________ __________ manufacturing processes are being redesigned to mimic how nature reduces and recycles wastes. ecoindustrial evolution __________-_____-__________ laws require companies to take back various consumer products instead of having them put in landfills or incinerated. Cradle-to-grave Tires being shredded and converted into surfacing for public roads is an example of __________ secondary recycling _________ are inefficient because they are expensive to build, discharge toxic emissions, and can produce a toxic ash. (MRF) Materials-recovery facilities __________ occurs when waste is made into new products of the original type. Primary, or closed-loop, recycling Ponds, pits, or lagoons into which liners are placed and liquid hazardous wastes are stored are called __________ __________. surface impoundments 13. __________ systems charge consumers for the amount of garbage picked up but do not charge for the amount of materials separated that can be recycled. Pay-as-you-throw __________ are sites where waste is isolated from the environment until it is safe. Sanitary landfills __________-_____-__________ incinerators produce 38% less CO2 per unit of energy than coal-burning power plants. Waste-to-energy Japan embraces resource exchange, and most of the country's municipal solid waste is sent to __________-_____-__________ _____________ to produce steam. waste-to-energy incinerators __________ involves using natural or genetically engineered plants to absorb, filter, and remove contaminants. Phytoremediation The U.S. has passed laws to facilitate the cleanup of abandoned, contaminated industrial sites, known as __________. brownfields In the United States, the __________ __________ _____ __________ __________ regulates only a small percentage of all hazardous waste. Resource Conservation and Recovery Act __________ utilizes bacteria and enzymes instead of plants to filter or destroy hazardous substances. Bioremediation. The call to drastically reduce toxic and hazardous waste, at least by 75%, is part of a concept called NOPE, which stands for Not On Planet Earth We should mimic nature by reusing, recycling, or composting at least _____% of the solid wastes we produce. 75 Use the Figure above to answer the following questions. Choose the letter that represents photostabilization. B Choose the letter that represents phytoextraction. d Choose the letter that represents rhizofiltration. a Choose the letter that represents phytodegredation. c Use the second chart to answer the following questions. Why is recycling an output approach for environmental concerns? Recycling deals with wastes already produced and harmful to the environment. The wastes are the outputs. Prevention of waste production or reduction of wastes is the best approach. Recycling usually reduces pollution and waste production. Explain how recycling reduces energy demand and makes fuel supplies last longer. Recycling uses oil products like tires for other applications. 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Do they still use lead weights to balance tires?Most new cars and light trucks sold in the US feature zinc or steel wheel weights, and all new cars and light trucks sold in the US have been free of lead wheel weights since 2009. Vehicle manufacturers made a significant commitment to phase out this use of lead.
Can tires can be recycled instead of thrown out?You can recycle it! Tire recycling is the most practical and environment-friendly way of disposing of old and worn-out tires. Due to their inherent durability, large volume and environment and health risks, tires are one of the most problematic sources of solid wastes.
Why is lead used for weights?Lead has high density (it is very heavy for its size) and fairly inexpensive, so it is commonly used to make weights such as fishing sinkers and dumbbells.
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