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168 (one hundred [and] sixty-eight) is the natural number following 167 and preceding 169. It is the number of hours in a week , or 7 x 24 hours . 168 is the fourth Dedekind number , [ 1 ] and the 128th composite number .
The offset 32.184 seconds was the 1976 estimate of the difference between Ephemeris Time (ET) and TAI, "to provide continuity with the current values and practice in the use of Ephemeris Time". [ 9 ] TAI is never revised once published and TT(TAI) has small errors relative to TT(BIPM), [ 6 ] on the order of 10-50 microseconds.
After more than 21 + 1 ⁄ 2 hours on the lunar surface, in addition to the scientific instruments, the astronauts left behind: an Apollo 1 mission patch in memory of astronauts Roger Chaffee, Gus Grissom, and Edward White, who died when their command module caught fire during a test in January 1967; two memorial medals of Soviet cosmonauts ...
169 178 227 254 310 337 377 352 270 224 195 161 3,054 [159] Moldova: Chișinău: 75 80 125 187 254 283 299 295 226 169 75 58 2,126 Monaco: Monaco: 149.8 158.9 185.5 210 248.1 281.1 329.3 296.7 224.7 199 155.2 136.5 2,575 [160] Montenegro: Podgorica: 123 126 170 194 251 276 340 314 252 201 126 109 2,481 Netherlands: Amsterdam: 63 88 126 183 222 ...
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10 29 2.1×10 29 J: Rotational energy of the Earth [251] [252] [253] 10 30: quetta-(QJ) 1.79×10 30 J: Rough estimate of the gravitational binding energy of Mercury. [254] 10 31 2×10 31 J The Theia Impact, the most energetic event ever in Earth's history [255] [256] 3.3×10 31 J: Total energy output of the Sun each day [240] [257] 10 32 1.71× ...
24 hours that exposed a schism between Trump and Johnson and sent the government hurtling toward a shutdown. Eric Bradner, Sarah Ferris, Annie Grayer, Kayla Tausche, Kristen Holmes and Alayna ...
Naturally occurring ytterbium (70 Yb) is composed of seven stable isotopes: [n 1] 168 Yb, 170 Yb– 174 Yb, and 176 Yb, with 174 Yb being the most abundant (31.83% natural abundance). 30 radioisotopes have been characterized, with the most stable being 169 Yb with a half-life of 32.014 days, 175 Yb with a half-life of 4.185 days, and 166 Yb with a half-life of 56.7 hours.