There are various formula of load calculation. Power equals current multiplied by the voltage. Power can also be computed by multiplying the resistance by the square of the current.
15 squared is 15 x 15 which equals 225.
60 is the square root you are looking for. 60 x 60 = 3600.
The square root property is where the number that is to the second ( or whatever number it is) power, is multiplied by itself.
H= v over pie r to the second
If T2 = 78, then T = 78(1/2) or the square root of 78, or about 8.83.
5 to the second power
2x2 = 228 divide both sides by 2 x2 = 114 x = ±√114 by the square root property