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Orders of magnitude (time) An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years. In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year". In other cases, the quantity name implies the base unit ...
The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. zeptosecond: 10 −21 s: One sextillionth of a second. Time measurement scale of the NIST and JILA strontium atomic clock. Smallest fragment of time currently measurable is 247 zeptoseconds. [3] attosecond: 10 −18 s: One quintillionth of a second ...
In astrophysics and quantum physics a jiffy is, as defined by Edward R. Harrison, [ 13 ] the time it takes for light to travel one fermi, which is approximately the size of a nucleon. One fermi is 10−15m, so a jiffy is about 3×10−24s. It has also more informally been defined as "one light-foot", which is equal to approximately one nanosecond.
The constant , the speed of light, converts time units (like seconds) into space units (like meters). The squared interval Δ s 2 {\displaystyle \Delta s^{2}} is a measure of separation between events A and B that are time separated and in addition space separated either because there are two separate objects undergoing events, or because a ...
Spacetime diagram. The world line (yellow path) of a photon, which is at location x = 0 at time ct = 0. A spacetime diagram is a graphical illustration of locations in space at various times, especially in the special theory of relativity. Spacetime diagrams can show the geometry underlying phenomena like time dilation and length contraction ...
Time constant. In physics and engineering, the time constant, usually denoted by the Greek letter τ (tau), is the parameter characterizing the response to a step input of a first-order, linear time-invariant (LTI) system. [ 1 ][ note 1 ] The time constant is the main characteristic unit of a first-order LTI system. It gives speed of the response.
The space station is whizzing around Earth at about five miles per second (18,000 mph), according to NASA. That means time moves slower for the astronauts relative to people on the surface. Now ...
10 2: hectosecond: 100: 1.67 minutes (or 1 minute 40 seconds) 10 3: kilosecond: 1 000: 16.7 minutes (or 16 minutes and 40 seconds) 10 6: megasecond: 1 000 000: 11.6 days (or 11 days, 13 hours, 46 minutes and 40 seconds) 10 9: gigasecond: 1 000 000 000: 31.7 years (or 31 years, 252 days, 1 hour, 46 minutes, 40 seconds, assuming that there are 7 ...