Results of the preliminary investigations on ways of thinking processes in solving physical problems are presented. The investigations were organized in high school classes for groups of students regarded by teachers as ...

Temperature dependence of the electric permeability and of the spontaneous polarization were studied. A systematic change in chemical composition was observed during the growth process. The ageing process dependence on ...

Methods of turbidity measurement are discussed and a prototype of a turbidimeter, its design and parameters are described.

The influence of the admixture of 3% $PbO$, 1% $La_2O_3$ and 1% $Nb_2O_5$ on the electric properties (electric permeability, electric conductivity, Seebeck coeficient and current - voltage, current - time characteristics) ...

In the conventional teaching of the Maxwell distribution law to the beginners, the calculus of variation and Lagrange's method of undetermined multipliers are used. As a result the beginner must frequently employ mathematics ...

A design of a new quartz thermostate is described. It controls: 1) The temperature of the sample from ambient temperature to 1270 K, 2) The pressure of the atmospheric air or other gases within the range from $133,3°10^{-6}$ ...

A concept of improving the transient process in an on-off temperature control unit. The power fed to the heating element is gradually increased or decreased in response to a sawtooth waveform from a generator controlled ...

The temperature changes of current - voltage and current - time characteristics having been investigated, data are used to define the type of conductivity and to determine the activation energy of the charge carriers. ...

Bound and scattering states ot the hydrogen atom are described using Lie algebras of groups 0/4/, 0/3,1/, 0/4,1/. Comparison with the results of the geometric quantization is made.