Duct tape is made of three separate layers, polyethylene, a cloth mesh and a rubber-based adhesive. While both synthetic and natural rubbers can be used to make the glue, natural rubber adhesive lasts longer than synthetic rubber adhesive.
A:The big orange balls found on some high power lines are designed to alert lower flying aircraft of the presence of these lines. Typically, these warning balls often are fashioned out of aluminum. In some cases, they are red in color.
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.
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.
A:There are several insects that prey on cotton plants, including boll weevils, cotton leafworms, cotton fleahoppers and cotton aphids. Cotton plants are relatively hardy crops, but are susceptible to damage from a number of bugs and insects. They are attacked by many types of predatory species, including beetles, mites, spiders and aphids.
A:Some examples of secondary industries are textile production, steel production, oil refining, food processing, aerospace manufacturing and consumer electronics. The automotive, brewing, energy, tobacco, ship-making and chemical industries are also secondary.
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.
A:The key industries in Pennsylvania as of 2013 are agribusiness, energy, technology, advanced manufacturing and materials, tourism, life sciences and the film industry, according to the Pennsylvania Department of Community & Economic Development. Among the largest is the agribusiness industry, which ships $32 billion in food products annually.
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.
A:Large dump trucks can haul about 28,000 pounds of material per load, equal to about 14 tons. However, dump trucks vary greatly, and dump truck manufacturers produce a variety of models, each with a different capacity.
A:Rock salt storage facilities are dome-shaped so trucks can easily enter and exit the storage area without obstacles like trusses or roof supports, according to the BBC and the Dome Corporation of America. Domed structures have high interior spans that allow freedom of movement for bulldozers and dump trucks.
A:Small tanker trucks have a maximum capacity of 3,000 gallons, while large tankers have a maximum capacity of 11,600 gallons. However, the maximum capacity of a tanker truck depends on the density of the liquid being transported, explains Bulk Cargo Systems. Tanker trucks are categorized by volume capacity and size.
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.
A:Many forms of life transport water from places where it is abundant to places where it is needed. Plants derive a great deal of water from the ground and transport it up to the stem, branches and leaves where it is needed for photosynthesis and turgidity. Many animals transport water in their bodies, and humans have devised complicated mechanisms that transport water throughout their settlements.
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.
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.
A:Mining gives people some of the resources needed for modern civilization, but it can lead to environmental harm. Some are opposed to mining based on opposition to destructive mining practices. Other dislike mining in general.
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.
A:Titanium is obtained through mining its ores, mostly in the form of titanium oxide in the minerals rutile and ilmenite, from open pits. The titanium oxide in these minerals must first be purified, then converted to titanium chloride, before titanium can be obtained. Titanium is the ninth most abundant element in the Earth's crust, but its mining and processing must be managed with expense and environmental concerns in mind.
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.