Open a can of roofing cement. This is an asphalt-based glue that will adhere to almost anything. Dip a 2-inch wide brush into the cement and lay a 2-inch line of cement from end to end of the roof, starting at the bottom edge of the building. Be liberal with the cement as you brush it along the roof edge.
In a direct current (DC) circuit, voltage or current is simple to define, but in an alternating current (AC) circuit, the definition is more complicated, and can be done in several ways. Root-mean-square (rms) refersto the most common mathematical method of defining the effective voltage or current of an AC wave. To determine rms value, three mathematical operations are carried out onthe function representing the AC waveform: (1) The square of the waveform function (usually a sine wave) is determined.
All AC voltages and currents are quoted as root-mean-square (rms) values where, for a sinusoidal waveform, the rms value is 0.707 V max or 0.707 I max. From this, you can determine the value of the amplitude V max or I max:V max = V rms/0.707 or I max = I rms/0.707.he root-mean-square (rms) value of a sinusoidal voltage or current is given by: Vrms = 0.707 Vmax and Irms = 0.707 Imax So, if the current has a peak-to-peak value of 10 A, â¦ then Imax will be half that value (5 A) , so the corresponding rms value is:Irms = 0.707 Imax = 0.707 x 5 = 3.54 A (Answer).