State system for ensuring the traceability of measurements. Ultrasonic power in liquids. General requirements to measuring methods in the frequency range 0,5 to 25 MHz
State system for ensuring the uniformity of measurements. Standard reference data. n-Tridecane. Thermophysical properties (density, heat capacity, enthalpy, entropy, sound velocity, thermal conductivity and viscosity coefficients) for the temperature range from the triple point to 700К at pressures up to 100 MPa
