According to National Geographic, hydroelectric power is used to power homes, offices, factories, hospitals and schools. It is also one of the first methods developing countries use to bring affordable electricity to rural areas.
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.
The public sector consists of organizations that are owned and operated by the government, while the private sector consists of organizations that are privately owned and that do not form part of the government. The public sector includes organizations run by federal, state and municipal government bodies.
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.
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 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.
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.
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 chamber of commerce is a membership organization that exists primarily to represent and promote the interests of its member businesses. Many chambers of commerce, especially those organized at the local level, also work to develop and deepen local relationship networks to promote business activity and business-to-business exchanges. Chambers of commerce also commonly engage in charitable activities that focus on local needs.
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.
Agro, or agriculture-based industries deal with growing plants and food for consumer use and consumption. Three basic levels exist in agriculture businesses.
Primary industries are those that harvest or extract raw materials from nature; they include agriculture, oil and gas extraction, logging and forestry, mining, fishing and trapping. In many countries, primary industries provide raw materials for manufacturing and heavy industries and are a stable economic base for rural communities, according to Statistics Canada. As a country develops, the percentage of its population working in the primary industries usually declines.
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.
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.
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.
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.
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.
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 manhole cover typically weighs between 90 and 150 pounds, according to Government Security News. At 450 pounds per cubic foot, a 32-inch cast-iron manhole cover can weigh up to 250 pounds.
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.
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.