Flow restrictors limit the amount of liquid or gas that flows from a faucet, reducing water bills and promoting environmentally friendly practices. They can be installed inside or outside faucets and shower heads, and are available in hardware stores. Air flow restrictors are also used to control air flow and pressure. A flow restrictor is […]
A cyberdoc is a major source of health and medical information transmitted via electronic media, including websites, data discs, email services, online videos, and mobile applications. While cyberdocs offer convenience and a wealth of information, addiction to them can lead to serious health problems and misdiagnosis. Experts recommend using cyberdocs for educational purposes only and […]
Shaft couplings join two shafts together in engines and can be welded, bolted, or held in place by a press fit or lynch pins. They are often used to join shafts of different sizes and can be splined or placed on a “D” shaped shaft. Proper maintenance is important to prevent coupling failure. A shaft […]
Katsudon is a Japanese dish of steamed rice topped with breaded and fried pork cutlet, egg, and broth. The name comes from tonkatsu and donburi, meaning “pork cutlet” and “large bowl” respectively. It is often eaten before important events and has various regional variations. Katsudon is a Japanese dish that consists of a large bowl […]
PVC pipe is a durable and long-lasting material commonly used in water systems, underground cables, and sewer lines. It was invented in 1925 by Dr. Waldo Semon and later found to have shock-absorbing capabilities, leading to the creation of PVC tire treads. PVC pipes are resistant to bacterial contamination and can withstand earthquakes, but not […]
A knockout plug is a removable piece that blocks unused holes or orifices, commonly used in garbage disposals and electrical boxes. It can be knocked out if the orifice needs to be used. It cannot be reinstalled, but can be replaced with a rubber stopper or spare plug. A knockout plug is a removable piece […]
Health physics is the study of how to manage radiation safely. Health physicists work in a variety of industries and specialize in areas such as radioactive waste management and environmental assessment. Training includes a two-year degree and certification from the National Registry of Radiation Protection Technologists or the American Board of Health Physics. Career opportunities […]
Inventory control involves managing inventory from raw materials to finished goods, with good controls keeping costs down and satisfying customers. Inventory control software streamlines the process, but local personnel are still needed for manual checks and troubleshooting. Ordering inventory and managing available inventory through techniques such as inventory rotation are also part of inventory control. […]
Carbolic soap, made with carbolic acid extracted from coal tar, was once a popular disinfectant in hospitals and homes. It can still be found in some regions and is effective against germs, grease, and dirt, but can irritate skin. Its distinctive scent is nostalgic for some, and it can be found in Caribbean stores or […]
Deep vee boats have taller or deeper sides, allowing them to navigate rough seas without water covering occupants or cargo. They require more power but ride more smoothly, making them popular for fishing, military ships, and offshore powerboat racing. They also offer added safety benefits for families. When referring to the types of boats, the […]
The hazel nut is a type of nut that grows in Europe, known by its scientific name Corylus maxima. Other types of hazelnuts may be preferred for commercial cultivation, but all nuts that are hazelnuts may also be called hazelnuts. Hazelnuts have many culinary applications, including spreads, desserts, and liqueurs. They are popular in the […]
Permanent magnets are always magnetic, unlike electromagnets which require an electric current. They are made of substances like magnetite or neodymium and have two poles, north and south. They have many uses, from refrigerator magnets to electric motors, but can also be a nuisance, erasing data from ATM cards and hard drives. A permanent magnet […]
A floor beam supports floor joists in homes with basements and can be made of steel or wood. It is supported by adjustable jacks and prevents sagging. Floor joists are commonly made of steel and rest on notches in the foundation. They can be concealed or left exposed and may require glue or nails for […]
Gastroesophageal reflux (GER) is a common digestive disorder that can occur in people of all ages, causing heartburn or an unpleasant taste in the throat. GER can be more difficult to detect in infants and children, and can cause serious complications such as sleep apnea, breathing problems, and malnutrition. Treatment for adults includes lifestyle modifications, […]
Activity drivers are events or activities that affect the overall cost of a product. Analysts use them to determine the cost of a product and reduce costs to make it cheaper. They also analyze activity factors to uncover overhead costs and estimate untraceable costs to ensure a profitable price. Managers and analysts find ways to […]
Rocket cars were used for dragster racing and land speed record attempts, but have been surpassed by jet engine-powered vehicles. Rockets have a high acceleration rate but a shorter operating capacity. The first rocket car was developed by Max Valier. As jet engine technology became more efficient and safer, the appeal of rockets waned. A […]
A derrick crane is a stationary or small mobile crane with a long, fixed-length tower that rotates at the base. It uses four lines for stability and can move freely in any direction, making it useful for construction sites and shipping platforms. It is commonly used to lift objects to high locations and is anchored […]
Steam rollers are heavy construction equipment used to level and smooth surfaces. Early versions were horse-drawn or hand-pushed, but steam-powered road vehicles were developed during the Industrial Revolution. The British firm Aveling & Porter produced the first commercially successful steam rollers in the late 1860s. Modern road rollers are no longer steam-powered, but the term […]
A professional proposal is a formal document outlining a plan for a project or campaign, used by entities to find suitable candidates. They are usually submitted as part of a competition and include information on qualifications, skills, cost, and timing. Companies can also submit requests for proposals for product development and construction projects. Writing professional […]
Boat winches can be used for various purposes, including hauling boats onto trailers, powering sails, securing boats to docks, and lifting boats out of the water. They can be manual or motorized and must be rated by weight capacity. Boat-mounted winches are used to control sails for increased efficiency. The term “boat winch” can refer […]
