2007-01-11 12:10:40 · 8 answers · asked by Anonymous in Family & Relationships ➔ Marriage & Divorce
How long is one second
Since 1967 the international standard definition of one second,established by an international system of units(SI System)has been the radiation frequency of a caesium atom- that is-9,192,631,770 hertz (cycles per second).
the frequency is measured by a caesium clock which regulates a quartz clock.
master atomic clocks at various national laboratories are syncronised through the international time bureau in Paris.
2007-01-11 12:17:03 · answer #1 · answered by jimmythejock 2 · 0⤊ 0⤋
How is the second defined? It is currently defined as the
time taken by exactly 9,192,631,770 oscillations of the radiation from
the hyperfine transition of a cesium atom. You can read about the
devices that measure this time to an accuracy of about 3 parts in
10^14, an incredible measurement feat:
2007-01-11 12:25:32 · answer #2 · answered by sweetpea 4 · 0⤊ 0⤋
A blink of an eye is a second and it is gone in a second.
2007-01-11 12:33:39 · answer #3 · answered by Closed Down 4 · 0⤊ 0⤋
Depends on what you are doing during that second.
2007-01-11 12:15:02 · answer #4 · answered by Royalhinney 7 · 0⤊ 0⤋
long enough to change a life drastically
2007-01-11 12:25:32 · answer #5 · answered by zether 6 · 2⤊ 0⤋
One mississippi...two mississippi...three mississippi...
2007-01-11 12:49:06 · answer #6 · answered by Koozie 5 · 0⤊ 0⤋
1,000 milliseconds
2007-01-11 12:21:13 · answer #7 · answered by dstyr 2 · 1⤊ 0⤋
there is no such thing as time
2007-01-11 12:13:05 · answer #8 · answered by gabby 5 · 0⤊ 0⤋