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  • 21Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …

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  • 22Hypoglycemia — For information about the popular condition that does not involve measured low glucose, see hypoglycemia (common usage). Hypoglycemia Classification and external resources Glucose meter ICD 10 …

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  • 23Global Maritime Distress Safety System — The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and… …

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  • 24Thermometer — A clinical mercury in glass thermometer …

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  • 25Missile guidance — A guided bomb strikes a practice target Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missile s target accuracy is a critical factor for its effectiveness. Guidance systems… …

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  • 26Eastern Orthodox Christian theology — is the theology particular to the Eastern Orthodox Church. It is characterized by monotheistic Trinitarianism, belief in the Incarnation of the Logos (Son of God), a balancing of cataphatic theology with apophatic theology, a hermeneutic defined… …

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  • 27Continuous-repayment mortgage — Analogous to continuous compounding, a continuous annuity[1][2] is an ordinary annuity in which the payment interval is narrowed indefinitely. A (theoretical) continuous repayment mortgage is a mortgage loan paid by means of a continuous annuity …

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  • 28Integrating ADC — An integrating ADC is a type of analog to digital converter that converts an unknown input voltage into a digital representation through the use of an integrator. In its most basic implementation, the unknown input voltage is applied to the input …

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  • 29Magnetic declination — Example of magnetic declination showing a compass needle with a positive (or easterly ) variation from geographic north. Magnetic declination is the angle between magnetic north (the direction the north end of a compass needle points) and true… …

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  • 30Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …

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