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A branch of physics that studies atoms as isolated systems of electrons and an atomic nucleus. Compare nuclear physics. atomic structure atomic weight (A) The sum total of protons (or electrons) and neutrons within an atom. audio frequency A periodic vibration whose frequency is in the band audible to the average human, the human hearing range.
newton per coulomb (N⋅C −1), or equivalently, volt per meter (V⋅m −1) energy: joule (J) Young's modulus: pascal (Pa) or newton per square meter (N/m 2) eccentricity: unitless Euler's number (2.71828, base of the natural logarithm) unitless electron: unitless elementary charge: coulomb (C) force
More Magic Triangle image mnemonics in the style of a cheat-sheet for high-school physics – in the SVG file, hover over a symbol for its meaning and formula. This is a categorized list of physics mnemonics .
While the values of the physical constants are independent of the system of units in use, each uncertainty as stated reflects our lack of knowledge of the corresponding value as expressed in SI units, and is strongly dependent on how those units are defined.
Start lying on your back with your knees bent and feet on the ground. Grab the back of one thigh to bring your knee to about a 90-degree angle. Do not pull your leg past your hip.
Your mid-back does a lot of work throughout the day—here are a few easy stretches to soothe and strengthen it. ... 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us ...
Tension is the pulling or stretching force transmitted axially along an object such as a string, rope, chain, rod, truss member, or other object, so as to stretch or pull apart the object. In terms of force, it is the opposite of compression. Tension might also be described as the action-reaction pair of forces acting at each end of an object.
You know the feeling: sharp, shooting pain radiating down the back of your leg. It hurts to sit, it hurts to walk and you’ve just about given up on finding a way to ease the sensation. Sciatica ...