That dip didn’t put anything out of commission, but clocks that are designed to accumulate the total zero-crossings of the power grid frequency of 50 Hz don’t keep accurate time when that ...

The higher the pitch of the sound, the higher the frequency, or number of vibrations in a given amount of time. The sound enters ... indicates that the signal has more power.

The allele frequency represents the incidence of a ... Changes in allele frequencies over time can indicate that genetic drift is occurring or that new mutations have been introduced into the ...

f = frequency = number of waves produced by a source per second, in hertz Hz. T = period = time it takes for one complete vibration or oscillation, in seconds s. A boat at sea bobs up and down as ...