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In electrical and safety engineering, hazardous locations (HazLoc, pronounced haz·lōk) are places where fire or explosion hazards may exist. Sources of such hazards include gases, vapors, dust, fibers, and flyings, which are combustible or flammable. Electrical equipment installed in such locations can provide an ignition source, due to ...
Fluorescent-lamp formats. Fluorescent lamps in various embodiments. Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics.
Bathythermograph. The bathythermograph, or BT, also known as the Mechanical Bathythermograph, or MBT; [ 1] is a device that holds a temperature sensor and a transducer to detect changes in water temperature versus depth down to a depth of approximately 285 meters (935 feet). Lowered by a small winch on the ship into the water, the BT records ...
The temperature Stefan obtained was a median value of previous ones, 1950 °C and the absolute thermodynamic one 2200 K. As 2.57 4 = 43.5, it follows from the law that the temperature of the Sun is 2.57 times greater than the temperature of the lamella, so Stefan got a value of 5430 °C or 5700 K. This was the first sensible value for the ...
Standard-definition television. Standard-definition television ( SDTV; also standard definition or SD) is a television system that uses a resolution that is not considered to be either high or enhanced definition. [ 1] Standard refers to offering a similar resolution to the analog broadcast systems used when it was introduced. [ 1][ 2]
An entertainment center (or centre ), also known as an entertainment complex or a home entertainment center, is a piece of furniture designed to house consumer electronic appliances and components. It is sometimes a large cabinet with an exterior styled to appear like upscale furniture and an interior dedicated to electronic gear, such as home ...
A Franklin stove. The Franklin stove is a metal-lined fireplace named after Benjamin Franklin, who invented it in 1742. [ 1] It had a hollow baffle near the rear (to transfer more heat from the fire to a room's air) and relied on an "inverted siphon" to draw the fire's hot fumes around the baffle. [ 2]
A fireplace poker (also known as a fire iron) is a short, rigid rod made of fireproof material used to adjust coal and wood fuel burning in a fireplace, and can be used to stir up a fire. A fireplace poker is usually metal and has a point at one end for pushing burning materials (or a hook for pulling/raking, or a combination) and a handle at ...