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Apex beat. The apex beat (lat. ictus cordis ), also called the apical impulse, [1] is the pulse felt at the point of maximum impulse ( PMI ), which is the point on the precordium farthest outwards (laterally) and downwards (inferiorly) from the sternum at which the cardiac impulse can be felt. The cardiac impulse is the vibration resulting from ...
In chemistry, reactivity is the impulse for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy . Reactivity refers to: theories to predict and to account for these processes. The chemical reactivity of a single substance (reactant) covers its behavior in which it ...
Adenosine 5′- (γ-thiotriphosphate) is an extremely common ATP analog in which one of the gamma-phosphate oxygens is replaced by a sulfur atom; this anion is hydrolyzed at a dramatically slower rate than ATP itself and functions as an inhibitor of ATP-dependent processes.
The pulse at the point of maximum impulse (PMI) is the apex beat of the heart; Post-mortem interval, the time since a death; Technique. Positive material identification of a metallic alloy; Preventive maintenance inspection, USAF; Other uses. US Presidential Management Internship, now Presidential Management Fellows Program
The maximum possible friction force between two surfaces before sliding begins is the product of the coefficient of static friction and the normal force: =. When there is no sliding occurring, the friction force can have any value from zero up to F max {\displaystyle F_{\text{max}}} .
The highest specific impulse chemical rockets use liquid propellants ( liquid-propellant rockets ). They can consist of a single chemical (a monopropellant) or a mix of two chemicals, called bipropellants. Bipropellants can further be divided into two categories; hypergolic propellants, which ignite when the fuel and oxidizer make contact, and ...
Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples of oscillation include a swinging pendulum and alternating current. Oscillations can be used in physics to approximate complex interactions, such ...
e. In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. [1] [2] The term potential energy was introduced by the 19th-century Scottish engineer and physicist William Rankine, [3] [4] [5] although it has links to the ancient ...