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.
For a cyclically alternating electric current, RMS is equal to the value of the direct current that would produce the same power dissipation in a resistive load. In econometrics the root mean square error of an estimator is a measure of the imperfection of the fit of the estimator to the data.