Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so. You know that kid in the front of the class?

This May marks the only time a calendar has a Square Root Day in a 20-year span, ... May 5, 2025 is Square Root Day. Here's the meaning of the numerical holiday. Catherine Messier.

Standard deviation is a statistic measuring the dispersion of a dataset relative to its mean. It is calculated as the square root of the variance. Learn how it's used.

Root mean square (r.m.s.) voltages and currents The r.m.s. value of an a.c. signal is equal to the value of direct current (d.c.) which would have the same effect or energy change as the a.c. For ...

Standard deviation measures how data is dispersed relative to its mean and is calculated as the square root of its variance. The further the data points are, the higher the deviation.

Tuesday is 3/3/09 and three is the square root of nine. The math-buffs' holiday only happens nine times each century. The next Square Root Day is April 4, 2016 — 4/4/16. Math lovers don't dispair.

Today is Cinco de Mayo. And this year, the fifth of May is filled with mathematical joy. It is — Square Root Day! It all started in 1981. "I was writing a check in late August," says Ron Gordon ...

Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so. You know that kid in the front of the class?