A hydraulic fall is a rapid decrease in water channel depth caused by natural or artificial changes in slope. It is the opposite of a hydraulic jump, which is a rapid increase in depth. Controlling water discharge can create both. Assessing a channel’s potential for these phenomena is crucial for building locks and controlling flow. […]
Voltage drop is the reduction of supply voltage in an electrical circuit due to resistance. It occurs across components and wiring, and must be calculated for sensitive applications. A voltage drop formula can be used to accurately calculate the drop. Voltage drop is a term used to describe any reduction in supply voltage in a […]
Drop tanks were auxiliary fuel tanks used in combat aircraft during WWII to extend their range. They allowed fighter planes to escort bombers deep into enemy airspace, but were vulnerable to enemy fire. The tanks could be easily dropped once a battle began, and were later adopted by racers for aerodynamic racing bodies. A drop […]
A suspended ceiling is a finishing system that hangs below the ceiling structure and can be made of steel grid and acoustic panels. It can be installed over existing drywall, wood framing, or tile finishes and offers advantages such as ventilation and easy access to mechanical equipment. However, it can also yellow over time, require […]
Former Bogota mayor Antanas Mockus hired mimes to shame bad drivers, reducing traffic deaths by half. He also demonstrated water conservation and asked for voluntary tax payments, resulting in a 40% decrease in water consumption and tripled tax revenues. Colombia has two coastlines and the most bird species, while Bogota has 186 miles of bike […]
A drop shipper is a wholesale supplier or separate business that stocks inventory products in warehouses across the country and handles shipping and delivery for small businesses. It offers convenience to small business owners, manufacturers, and customers, and is ideal for internet-based businesses without inventory. The process involves the small business owner listing a product, […]
A drop shadow is a computer graphic effect that simulates a shadow under or near an object. It adds dimension and style to text or objects and can be used in websites, user interfaces, and photo editing software. It is encoded through style sheet languages like CSS. A drop shadow is a term used in […]
Drag and drop is a user interface technique that involves holding down the primary mouse button and directing the mouse to a destination. It is an industry standard among operating systems and is used in various software applications, including email clients and games. Touch-screen devices also use this method for their user interface techniques. However, […]
Drop sets are a bodybuilding technique where a muscle group is exercised with a heavy weight until exhaustion, then continued with a lower weight without rest. This increases muscle size but is not effective for strength training. It is recommended to start with a high weight and reduce by 15-20% per set. Drop sets should […]
A point release is a minor update to software that increases the version number after a decimal point. It typically fixes bugs or adds minor improvements, but can also include large-scale revisions. Version numbers track changes and are separated by decimal points, with more decimal points indicating fewer changes. Unusual numbering schemes may be used, […]
Drop seat pajamas, also known as butt lapel pajamas, have a flap over the buttocks that can be pulled down for easy toilet use. They are mainly made for children, but adult versions are available for novelty or medical purposes. They are often made of flame-retardant materials and come in a variety of colors and […]
Fall arrest devices, such as harnesses, guardrails, safety nets, and warning lines, protect people from falling and being injured in industries like construction, performance art, and sports. Harnesses are the most common restraint system, while guardrails physically block falls, safety nets cushion falls, and warning lines serve as a visual reminder of elevated surfaces. A […]
Stop, drop and roll is a fire safety technique taught to children to put out flames on the body or clothing. It involves stopping, dropping to the ground, covering the face, and rolling to smother the flames. It is most effective when used with other firefighting techniques and those who have used it should seek […]
Pear drops are traditional English boiled sweets shaped like a pear and usually half pink and half yellow. Previously, artificial colors and flavors were used, but now natural ingredients like pear juice concentrate or apple extract malic acid are used. The main ingredients are brown sugar, glucose syrup, and flavor and color. The mixture is […]
Potential drop is the loss of electrical energy between two points due to resistance in a conductor, which converts some of the energy into heat. Increasing wire diameter can limit potential drop, but active measures are often more efficient. Potential drop also applies to fluid dynamics. Potential drop, also called voltage drop, is the difference […]
Prince Rupert’s Drops are glass teardrops made by dropping molten glass into cold water. The outside cools quickly, while the inside takes longer, creating a state of tension. The head cannot be broken, but if the tail is damaged, the drop will explode. They are named after Prince Rupert of the Rhine and are an […]
Drop attacks, commonly experienced by older people, involve a sudden feeling of legs giving out and falling to the floor. They are not a medical condition, but a symptom of various medical problems. Diagnosis requires real-time monitoring, and treatment varies depending on the cause. The main risk is injury from falling, particularly in older people […]
A dead drop is a way for two people to exchange information without meeting in person. It can be a public place or use technology, and offers benefits such as minimizing suspicion and protecting spy group members. Signs are left to alert the receiver, and modern dead drops can be electronic. A dead drop or […]
Wrist drop, or radial neuropathy, is caused by damage to the radial nerve in the arm, often from sitting in an uncomfortable position for an extended period of time. Symptoms include weakness, numbness, and the inability to extend or raise the hand. Healing time varies, but physical therapy and exercises can help. Wrist drop, also […]
The drooping bear, a fictional carnivorous relative of the koala, is said to attack unsuspecting tourists in Australia. Locals suggest bizarre ways to prevent attacks, and different types of fall bears have been created. The legend may have originated as a way to keep children away from dangerous eucalyptus trees or to explain the existence […]
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