Every 20 Milliseconds it updates.
30 Seconds
The POP protocol, by default, downloads messages to your computer and then deletes them from the mail server. If you leave all of your email on a primary computer (for example, your office computer) but want to have access to recently received email on a secondary computer (a home computer), you should leave your messages on the server for a limited period of time.
The default tumbstone life period is sixty days.
Period = 1/78.6 seconds = 0.01272 seconds
The SI unit for period is seconds and the symbol is t (because the period is a time measurement, it is expressed in the SI unit seconds)
The frequency is the reciprocal of the period. In other words, divide 1 by the period. If the period is in seconds, the frequency is in hertz.
The period of a wave can be calculated as the inverse of its frequency. In this case, the period would be 1/250 seconds, which is equal to 0.004 seconds.
Frequency = (1)/(period) .If the period is still 4 seconds, then the frequency = (1)/(4 seconds) = 0.25 per second = 0.25 Hz.
8 Days
Period = 1/Frequency = 0.00175 seconds (approx)Period = 1/Frequency = 0.00175 seconds (approx)Period = 1/Frequency = 0.00175 seconds (approx)Period = 1/Frequency = 0.00175 seconds (approx)
Time period of a seconds pendulum is 99.3955111cm at a place where the gravitational acceleration is 9.8m/s2
The frequency of a pendulum is the reciprocal of its period, so a pendulum with a period of 40 seconds will have a frequency of 0.025 Hz.