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Triboluminescence in quartz. Certain household materials and substances can be seen to exhibit the property: Ordinary pressure-sensitive tape ("Scotch tape") displays a glowing line where the end of the tape is being pulled away from the roll. [10] Soviet scientists observed in 1953 that unpeeling a roll of tape in a vacuum produced X-rays. [11]
During commercial powder processing [3] [125] [126] or in natural processes such as dust storms, [127] [128] [8] triboelectric charge transfer can occur. There can be electric fields of up to 160kV/m with moderate wind conditions, which leads to Coulomb forces of about the same magnitude as gravity. [129]
Piezoelectric balance presented by Pierre Curie to Lord Kelvin, Hunterian Museum, Glasgow. Piezoelectricity (/ ˌ p iː z oʊ-, ˌ p iː t s oʊ-, p aɪ ˌ iː z oʊ-/, US: / p i ˌ eɪ z oʊ-, p i ˌ eɪ t s oʊ-/) [1] is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in ...
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The maximum Q for a high stability quartz oscillator can be estimated as Q = 1.6 × 10 7 /f, where f is the resonant frequency in megahertz. [21] [22] One of the most important traits of quartz crystal oscillators is that they can exhibit very low phase noise. In many oscillators, any spectral energy at the resonant frequency is amplified by ...
The selected grains are chemically treated with HCl to digest carbonates and with H 2 O 2 to remove organic materials [7] that can contaminate the sensitivity of OSL signal during measurement. Feldspar and quartz with densities of < 2.62 g cm −3 and < 2.68 g cm −3 respectively are separated from other heavier minerals by density separation. [7]
Glass rods can also be used to demonstrate electrification by friction. This occurs when there are two surfaces rubbing together. In this instance, rubbing a glass rod with silk transfers negative charge from it. This effect is known as the triboelectric effect and can be performed with a variety of materials. [7]
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