how many micro seconds are in a second
Microsecond A microsecond is an SI unit of time equal to one millionth (0.000001 or 10−6 or 1/1,000,000) of a second. Its symbol is μs.
Metre per second squared As acceleration, the unit is interpreted physically as change in velocity or speed per time interval, i.e. metre per second per second and is treated as a vector quantity.
Rate equation k is the first order rate constant, which has units of 1/s or sâˆ’1.
Second Though the historical definition of the unit was based upon this division of the Earth's rotation cycle, the formal definition in the International System of Units SI is a much steadier timekeeper: 1 second is defined to be exactly 9 192 631 770 cycles of a Caesium atomic clock.[1][2][3] Because the Earth's rotation varies and is also slowing ever so slightly, a leap second is added to clock time[nb 2] to keep clocks in sync with Earth's rotation.