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2. Crystal oscillator - Wikipedia

   en.wikipedia.org/wiki/Crystal_oscillator

   A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. [1] [2] [3] The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers.

3. Calcite - Wikipedia

   en.wikipedia.org/wiki/Calcite

   Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO 3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed ...

4. Quartz clock - Wikipedia

   en.wikipedia.org/wiki/Quartz_clock

   Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some form of digital logic ...

5. Pierce oscillator - Wikipedia

   en.wikipedia.org/wiki/Pierce_oscillator

   The Pierce oscillator is a type of electronic oscillator particularly well-suited for use in piezoelectric crystal oscillator circuits. Named for its inventor, George W. Pierce (1872–1956), [1][2] the Pierce oscillator is a derivative of the Colpitts oscillator. Virtually all digital IC clock oscillators are of Pierce type, as the circuit can ...

6. 2025's Social Security COLA: There's Great News and Not-So ...

   www.aol.com/2025s-social-security-cola-theres...

   And the most recent projection puts 2025's raise at 2.5%. That's not the best news. Not only is a 2.5% raise pretty mild to begin with, but it's also the smallest COLA to arrive since 2021. In ...

7. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

8. Fused quartz - Wikipedia

   en.wikipedia.org/wiki/Fused_quartz

   Fused quartz, fused silica or quartz glass is a glass consisting of almost pure silica (silicon dioxide, SiO 2) in amorphous (non- crystalline) form. This differs from all other commercial glasses, such as soda-lime glass, lead glass, or borosilicate glass, in which other ingredients are added which change the glasses' optical and physical ...

9. List of 26 'Most Expensive Dog Breeds' Contains Quite a Few ...

   www.aol.com/list-26-most-expensive-dog-191500104...

   A new list highlights the "most expensive" dog breeds, and among the 26 breeds listed, there are more than a few surprises. On August 17, 2024, Reader's Digest released an updated version of their ...