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A transcutaneous electrical nerve stimulation (TENS or TNS) is a device that produces mild electric current to stimulate the nerves for therapeutic purposes.TENS, by definition, covers the complete range of transcutaneously applied currents used for nerve excitation, but the term is often used with a more restrictive intent, namely, to describe the kind of pulses produced by portable ...
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
Transcutaneous electrical nerve stimulation (TENS) is a self-operated portable device intended to help regulate and control chronic pain via electrical impulses. [17] Limited research has explored the effectiveness of TENS in relation to pain management of multiple sclerosis (MS).
Units in geochronology and stratigraphy [5] Segments of rock in chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem: Eon: 4 total, half a billion years or more Erathem: Era: 10 defined, several hundred million years System: Period: 22 defined, tens to ~one hundred million years Series: Epoch
≈ 1 British thermal unit (BTU), depending on the temperature [59] 1.4×10 3 J: Total solar radiation received from the Sun by 1 square meter at the altitude of Earth's orbit per second (solar constant) [93] 2.3×10 3 J: Energy to vaporize 1 g of water into steam [94] 3×10 3 J: Lorentz force can crusher pinch [95] 3.4×10 3 J
Units for other physical quantities are derived from this set as needed. In English Engineering Units, the pound-mass and the pound-force are distinct base units, and Newton's Second Law of Motion takes the form = where is the acceleration in ft/s 2 and g c = 32.174 lb·ft/(lbf·s 2).
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