In a hiring freeze, an employer decides to stop hiring employees for all non-essential positions. It allows an employer to consolidate current employees and potentially restructure departments to complete the work that is essential for serving the customers of the business.
Since the electrical conductivity is a measure to the capacity of water to conduct electrical current, it is directly related to the concentration of salts dissolved in water, and therefore to the Total Dissolved Solids (TDS). Salts dissolve into positively charged ions and negatively charged ions, which conduct electricity.
up vote 2 down vote. Thermal conductivity is, as Mark writes, is in SI units measured in $Wm^{-1}K^{-1}$, i.e. $\frac{power}{distance \times temperature}$. However, the $m^{-1}$ needs a little more explanation. The rate of heat flow is proportional to the surface area, and inversely proportional to the thickness.