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Within a few seconds of the collapse process, a substantial fraction of the matter in the white dwarf undergoes nuclear fusion, releasing enough energy (1– 2 × 10 44 J) [85] to unbind the star in a supernova. [86]
In the mid-1960s, to defeat the advantage of the recently introduced computers for the then popular rally racing in the Midwest, competition lag times in a few events were given in centids (1 ⁄ 100 day, 864 seconds, 14.4 minutes), millids (1 ⁄ 1,000 day, 86.4 seconds), and centims (1 ⁄ 100 minute, 0.6 seconds) the latter two looking and ...
This time happens to correspond roughly to the time of the formation of the Solar System and the evolutionary history of life. Stelliferous Era: 150 Ma ~ 100 Ta [19] 20 ~ −0.99: 60 K ~ 0.03 K: The time between the first formation of Population III stars until the cessation of star formation, leaving all stars in the form of degenerate ...
31 January – Researchers find evidence that reading on electronic devices can reduce comprehension. Reading text on a smartphone was found to promote overactivity in the prefrontal cortex and reduce sighing frequency compared to reading text on paper. [84] [85]
List of countries by carbon emissions Location % of global total Fossil emissions (1,000,000 tons per year) % change from 2000 2023 2000 World 100%: 39,023.94
[287] [291] [292] [293] A preprint suggests that cases "where a small fraction of individuals have disproportionately large numbers of partners, can explain the sustained growth of monkeypox cases among the MSM population" (13 June). [294] [295] The MP incubation period is estimated to be 8.5 days on average and up to 21 days (16 June).
Researchers show that a new type of X-ray detector, based on a thin film of the low-cost semiconductor mineral perovskite, is 100 times more sensitive than a conventional silicon-based device. The technology could reduce unhealthy radiation exposure and improve the resolution and applications of security scanners and research tools. [70] [71 ...
The Luftwaffe lacked an effective air defence system early in the war. Allied daylight actions over German controlled territory were sparse in 1939–1940. The responsibility of the defence of German air space fell to the Luftgaukommandos (air district commands), which controlled the anti-aircraft artillery (AAA), the civilian Aircraft Warning Service, and fighter forces assigned to air ...