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Since the IGBTs switch on and off at a regulated cycle rate, a generator can be slightly off-speed and the lamp will still be flicker-free, which is not the case with a standard magnetic ballast. The square wave nature of the output results in a straight-line power output from the lamp.
Gouache (/ ɡ u ˈ ɑː ʃ, ɡ w ɑː ʃ /; French:), body color, [a] or opaque watercolor is a water-medium paint consisting of natural pigment, water, a binding agent (usually gum arabic or dextrin), [1] and sometimes additional inert material. Gouache is designed to be opaque. Gouache has a long history, having been used for at least twelve ...
Acrylic gouache is like traditional gouache because it dries to a matte, opaque finish. However, unlike traditional gouache, the acrylic binder makes it water-resistant once it dries. [ 32 ] Like craft paint, it will adhere to a variety of surfaces, not only canvas and paper.
Tritium is the only radiation source used in radioluminescent light sources today due to its low radiological toxicity and commercial availability. [3] Various preparations of the phosphor compound can be used to produce different colors of light. For example, doping zinc sulfide phosphor with different metals can change the emission wavelength ...
A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once.
Fugitive pigments are impermanent pigments that lighten, darken, or otherwise change in appearance or physicality over time when exposed to environmental conditions, such as light, temperature, humidity, or pollution. [1] [2] Fugitive pigments are present in types of paint, markers, inks etc., which are used for temporary applications.
Pick-up sticks, pick-a-stick, jackstraws, jack straws, spillikins, spellicans, or fiddlesticks is a game of physical and mental skill in which a bundle of sticks, between 8 and 20 centimeters long, is dropped as a loose bunch onto a table top into a random pile. Each player, in turn, tries to remove a stick from the pile without disturbing any ...
These were used to light fires and fire guns (see matchlock) and cannons (see linstock) [3] and to detonate explosive devices such as dynamite sticks. Such matches were characterised by their burning speed i.e. quick match and slow match. Depending on its formulation, a slow match burns at a rate of around 30 cm (1 ft) per hour and a quick ...