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The rotation rate of the Earth (Ω = 7.2921 × 10 −5 rad/s) can be calculated as 2π / T radians per second, where T is the rotation period of the Earth which is one sidereal day (23 h 56 min 4.1 s). [2] In the midlatitudes, the typical value for is about 10 −4 rad/s.
Omega cal. 321 movement. The Speedmaster was not originally designed for space exploration. Instead, it was introduced in 1957 as a sport and racing chronograph following on from the early chronographs of the 1920s and 1930s, including the Omega 28.9 chronograph, which was Omega's first small wrist chronograph, complementing Omega's position as the official timekeeper for the Olympic Games.
In 1967 the beta-2 was tested and was awarded 'Concours Chronométrique International de l'Observatoire de Neuchâtel' setting a new record for wristwatch accuracy over the test period of 0.003 seconds per day, by contrast even the best chronometers of the day were accurate to around 3–10 seconds per day. [3] In 1969, two years after the beta ...
10 −2: centisecond cs One hundredth of one second 1.6667 cs: The period of a frame at a frame rate of 60 Hz. 2 cs: The cycle time for European 50 Hz AC electricity 10–20 cs (=0.1–0.2 s): The human reflex response to visual stimuli 10 −1: decisecond ds One tenth of a second 1–4 ds (=0.1–0.4 s): The length of a single blink of an eye [14]
Of the numerous protein secondary structures present, the 3 10-helix is the fourth most common type observed; following α-helices, β-sheets and reverse turns. 3 10-helices constitute nearly 10–15% of all helices in protein secondary structures, and are typically observed as extensions of α-helices found at either their N- or C- termini.
Omega 1 Cancri, which is Latinized from ω 1 Cancri, is a yellow-hued star in the zodiac constellation of Cancer. It is a faint star near the lower limit of visibility to the naked eye, having an apparent visual magnitude of 5.85. [ 2 ]