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WWVB is a time signal radio station near Fort Collins, Colorado and is operated by the National Institute of Standards and Technology (NIST). [ 1] Most radio-controlled clocks in North America [ 2] use WWVB's transmissions to set the correct time. The normal signal transmitted from WWVB is 70 kW ERP and uses a 60 kHz carrier wave yielding a ...
Fire alarm system. A fire alarm system is a building system designed to detect, alert occupants, and alert emergency forces of the presence of fire, smoke, carbon monoxide, or other fire-related emergencies. Fire alarm systems are required in most commercial buildings. They may include smoke detectors, heat detectors, and manual fire alarm ...
July 13, 2024 at 5:45 AM. Shares in Amazon (NASDAQ: AMZN) hit a new all-time high last week, rising to $200 per share. The rally came as multiple tech companies similarly achieved new highs ...
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
Ocasio-Cortez was born in the New York City borough of the Bronx on October 13, 1989, the daughter of Sergio Ocasio-Roman and Blanca Ocasio-Cortez ( née Cortez ). [12] She has a younger brother named Gabriel. [13] Her father was born in the Bronx to a Puerto Rican family and became an architect; her mother was born in Puerto Rico.
Physical cosmology. The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
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