1.The accuracy of Angstrom formula is estimated. The agreement of Angstrom formula with measurement data and the valid range of the Angstrom formula are discussed.
5.Abstract: Discusses the physical process of air infiltra tion under wind pressure combined with thermal pressure, accordingly points out an ambiguity of the calculation procedure in the current HVAC regulation, obtain s its error range and presents a more reasonable formula for the calculation.
6.A good accuracy of power consumption in the transition range of pseudoplastic fluid (CMC water solution) could be obtained by using the formula:ln Np=A1+A2lnRe+A3(lnRe)2.
9.For the wavelength data of hydrogen spectra line(visible range), whether we can use the modern methods of handling data to derive the Balmer formula and to be in accord with logic, the answer is affirmative.
