Search results
Results from the WOW.Com Content Network
The nearest known quasar, Markarian 231, is about 581 million light-years from Earth, [129] while others have been discovered as far away as UHZ1, roughly 13.2 billion light-years distant. [ 130 ] [ 131 ] Quasars are noteworthy for providing the first demonstration of the phenomenon that gravity can act as a lens for light .
On average the Moon's surface gravity is 1.62 m/s 2 [4] (0.1654 g; 5.318 ft/s 2), about half of the surface gravity of Mars and about a sixth of Earth's. The Moon's gravitational field is not uniform. The details of the gravitational field have been measured through tracking the Doppler shift of radio signals emitted by orbiting spacecraft.
An octave—two notes that have a frequency ratio of 2:1—spans twelve semitones and therefore 1200 cents. The ratio of frequencies one cent apart is precisely equal to 2 1 ⁄ 1200 = 1200 √ 2, the 1200th root of 2, which is approximately 1.000 577 7895. Thus, raising a frequency by one cent corresponds to multiplying the original frequency ...
The actual size of the drive bays differ from their name (e.g., 3 1 ⁄ 2" drive bays are actually 4 inches (101.6 mm) wide, because 3 1 ⁄ 2" refers to the historical platter diameter inside the drive). The newer 2 1 ⁄ 2 inch and 1.8 inch drive bays are specified in
A certain degree of peace achieved at the start of the 15th century helped settle the value of French currency. After 1422 the gros of 1 sol Parisis was minted at 96 to a French Mark, 3 ⁄ 4 fine (hence 1.912 g per gros), while the Écu of 20 sols Parisis was minted at 64 to a French Mark, 22 + 1 ⁄ 2 karats or 15 ⁄ 16 fine