Industries

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Lead is a chemical element, so it does not form; however, manufacturers produce it by roasting galena, according to About.com. Galena is one of the lead ores, composed primarily of lead sulfate.

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  • Why are diamonds so expensive?

    Q: Why are diamonds so expensive?

    A: Diamonds are expensive because the supply of diamonds on the world market is restricted by DeBeers. The price of diamonds would be much lower if the supply were not artificially suppressed.
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  • How does a sewage treatment plant work?

    Q: How does a sewage treatment plant work?

    A: Sewage treatment plants work through a series of steps that involves extracting waste and oxygenating wastewater, with the end result being waste removed from the sewage. By the time water sewage moves through the entire process, it has been disinfected and discharged into a local body of water.
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  • How does a hay baler work?

    Q: How does a hay baler work?

    A: Hay balers are used to harvest hay, and they operate by being powered and pulled by a tractor as the baler's metal teeth gently rake up the hay to a compressor bar that holds the hay in place as the auger feeds the hay into the hay chamber. The chamber contains a plunger that continuously packs the hay down into tight clumps while also cutting the ends of the hay so they have a uniform shape.
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  • What is a power plant?

    Q: What is a power plant?

    A: A power plant is a facility for the generation of bulk electric power. Power plants produce electric energy from another form of energy. The type of converted energy depends on the type of power plant. Each type of power plant poses a distinct set of advantages and drawbacks.
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  • What is primary and secondary packaging?

    Q: What is primary and secondary packaging?

    A: Primary packaging is the layer of packaging that comes in direct contact with the product. Secondary packaging is the layer of packaging that surrounds groups of pre-packaged parts that are enclosed in the primary packaging. Each layer of packaging serves a specific function.
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  • How far apart are telephone poles situated?

    Q: How far apart are telephone poles situated?

    A: Telephone poles, also called utility poles, differ in their spacing when located in urban versus rural areas. Within a U.S. urban landscape, utility poles tend to be spaced 125 feet apart. In rural areas, utility poles are spaced as much as 300 feet apart.
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  • How much does it cost to start a magazine?

    Q: How much does it cost to start a magazine?

    A: Creating a magazine requires nothing more than content, a printer and ink. However, according to Entrepreneur Media Inc., getting a first issue of a magazine in stores can cost around $15,000 in total, but local stores might be willing to offer a discount for local magazines.
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  • How much does a 55-gallon drum of oil weigh?

    Q: How much does a 55-gallon drum of oil weigh?

    A: The weight of a 55-gallon oil drum depends on oil density. A 55-gallon drum of crude oil with a density of 790 kilograms per cubic meter would weigh about 188.98 kilograms.
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  • What are agro-based industries?

    Q: What are agro-based industries?

    A: Agro, or agriculture-based industries deal with growing plants and food for consumer use and consumption. Three basic levels exist in agriculture businesses.
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  • What is LP gas?

    Q: What is LP gas?

    A: Liquefied Petroleum Gas is a clean energy source derived from hydrocarbons such as butane and propane. It’s produced when crude oil is being refined and during the extraction of natural gas and oil from the earth. At normal temperature and pressure, LP gas occurs in gaseous form.
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  • How do hydraulic cranes work?

    Q: How do hydraulic cranes work?

    A: Hydraulic cranes work using the concept of transmitting a force from one point to another through a fluid. Fluids, especially liquids, play a vital role in hydraulics because of their mechanical properties such as how they move, how they react to pressure and how they resist movement.
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  • What do we use oil for?

    Q: What do we use oil for?

    A: Oil has many industrial and household uses. Crude oil, a non-renewable fossil fuel, is refined into gasoline and diesel fuels that power automobiles and other engines. Oil is also used to lubricate moving metal parts in order to reduce friction and heat. Kerosene and propane are by-products of oil refinement and are commonly used for home heating and cooking.
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  • What is the National Association of Professional Pet Sitters?

    Q: What is the National Association of Professional Pet Sitters?

    A: The National Association of Professional Pet Sitters, or NAPPS, is a nonprofit trade organization that provides business resources for pet sitters and helps pet owners find high-quality care. Companies, employees and individual pet sitters apply for paid membership, gaining access to publications, conferences and other business enrichment opportunities. NAPPS influences industry standards through certification tests. It also offers pet sitters health and liability insurance through Business Insurers of the Carolinas.
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  • What are the advantages and disadvantages of mining?

    Q: What are the advantages and disadvantages of mining?

    A: Mining gives people a portion of the resources needed for modern civilization, but it can also lead to environmental harm. While some are in favor of mining due to the resources it produces and the jobs it provides in the U.S., some are opposed to mining based on opposition to destructive mining practices and environmental concerns.
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  • What is sand fracking?

    Q: What is sand fracking?

    A: Sand fracking is when sand is used as a proppant and blasted into a gas shale well to promote the production of gas. Sand is mixed with industrial fluids and water during hydraulic fracturing to force open underground cracks where natural gas is produced.
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  • What are the advantages and disadvantages of print media?

    Q: What are the advantages and disadvantages of print media?

    A: Print media has many advantages and disadvantages, depending on the type of outcome the writer and publisher are looking for. Articles published in print are tangible, which gives them an advantage that online pieces do not have. On the other hand, the Internet is more accessible to a wider range of writers and audiences.
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  • How does an effluent treatment plant work?

    Q: How does an effluent treatment plant work?

    A: An effluent water treatment plant works by removing sludge, scum and bacteria from wastewater before releasing the effluent, or treated water, back into the environment, according to the U.S. Geological Survey. Wastewater enters the treatment plant and goes through several processes before effluent goes into a nearby lake or river.
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  • What different types of industries are there?

    Q: What different types of industries are there?

    A: There are many different industry sectors across the globe, including mining, construction, manufacturing, retail, transportation, healthcare, education and agriculture. The definition of an industry is the production of goods or services within an economy.
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  • In research, what is a pilot test?

    Q: In research, what is a pilot test?

    A: A pilot test or pilot study is used to conduct preliminary analysis before going ahead with a full-blown research study or experiment. It is essentially a test run or rehearsal of the main experiment or study.
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  • What is the role of financial institutions?

    Q: What is the role of financial institutions?

    A: The primary role of financial institutions is to provide liquidity to the economy and permit a higher level of economic activity than would otherwise be possible. According to the Brookings Institute, banks accomplish this in three main ways: offering credit, managing markets and pooling risk among consumers.
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  • How is coal used?

    Q: How is coal used?

    A: The primary use of coal is as a source of energy. Nations around the world use coal to produce electricity. Steel manufacturers also use coal to create a fuel called coke. Coal is formed from plants that were buried in the earth millions of years ago.
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