LED
An LED (Light-Emitting Diode) emits light when forward current flows. It is polarized and usually needs a series resistor to limit current.
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An LED (Light-Emitting Diode) emits light when forward current flows. It is polarized and usually needs a series resistor to limit current.
Translate a height, wave, or rotation condition into a trig equation and keep only physically meaningful times.
A nuclear reaction is a process in which nuclei or nuclear particles interact and produce different nuclei or particles. The Q-value represents the…
An NPN transistor has base, collector and emitter terminals. A small base input controls a larger collector-emitter current for switching or amplification.
For ax+by=e, cx+dy=f, the coefficient matrix A=[[a,b],[c,d]]. x = |Ax|/|A| and y = |Ay|/|A|, where Ax replaces the x-column by the constants, and Ay…
Remainder theorem: evaluate p at a point without expanding a huge power (or to check a factor quickly). Factor theorem: split cubics that appear in equations…
The arrangement of electrons in sub-shells is called the electronic configuration. Simple explanation: Electronic configuration tells you where the…
sqrt(2) is not equal to ab for any integers a, b with b != 0. An isosceles right triangle with legs of side 1 has hypotenuse sqrt(1^2 + 1^2) = sqrt(2).…
Common Problems in HCI are recurring issues in the design and functioning of computer systems that negatively affect how users interact with them, leading…
Differentiation and integration are inverse processes under continuity conditions.
State Change (Phase Transition): A state change (or phase transition) is the transition of matter from one state to another, such as: - solid → liquid -…
An unsaturated solution is a solution which contains lesser amount of solute than that which is required to saturate it at a given temperature. Simple…
sp² hybridization is the mixing of one s and two p orbitals to form three sp² hybrid orbitals of equal energy and shape. Key Features · Three sp² hybrid…
DNA copies before mitosis/meiosis (S phase). Semiconservative: each new helix keeps one old strand (Meselson-Stahl named). Helicase named: unwind. DNA…
Analog signals are continuous and can take any value within a given range. Digital signals are discrete and use only specific values, typically represented by…
Prions: Prions are infectious protein particles, smaller than viruses, that contain no nucleic acids (neither DNA nor RNA). Viroids: Viroids are…
Sewage is wastewater that typically contains biodegradable organic matter, pathogens, and nutrients. Untreated sewage threatens health (disease risk from…
A fair experiment gives high control: you change one factor and watch the rest. The cost is time, money, and errors. You still run it because talk is not…
Hormones: Hormones are organic chemicals secreted by a cell. They coordinate different functions in the body by carrying messages through blood to various…
A locus is the set of all points that obey a rule. In plane geometry the usual Class 9 loci are: a circle (fixed distance from a point), a perpendicular…
Blood Flow: Blood flow means simply the quantity of blood that passes through a given point in the circulation in a given period. The overall blood flow in…
Limiting reactant. Ester eq: never all product unless you shift. Quote 2-3 s.f. as the paper. Low yield: side products, incomplete reaction, loss on transfer —…
Within the elastic limit, work done stretching a material equals the area under its force-extension graph and is stored as elastic potential or strain energy:…
Bases are substances that: · Taste bitter · Feel slippery in aqueous solution · Turn red litmus blue · Neutralize acids to form salt and…