Newton’s Law of Cooling Newton’s Law of Cooling Newton’s Law of Cooling is used to model the temperature change of an object of some temperature placed in an environment of a different temperature. The law states that where T is the temperature of the object at time t, R is the temperature of the surrounding environment (constant) and k is a constant … Read more
Neher McGrath Calculations Notes Neher-McGrath Calculations The Neher-McGrath Calculations provide a method for calculating underground cable temperatures or ampacity ratings and are derived from the following technical paper: J. H. Neher and M. H. McGrath,“The Calculation of the Temperature Rise and Load Capability of Cable Systems”, AIEE Transactions, Part III, Volume 76, pp 752-772, October, … Read more
Mechanics of Materials Notes StressStress is defined as force per unit area. This is one of the most basic engineering quantities.Shear StressShear stress has the same units as normal stress (force / area) but represents a stress that acts parallel to the surface (cross section). This is different from normal stress which acts perpendicular (normal) … Read more