Heat transfer is the exchange of thermal energy between physical systems. The rate of heat transfer is dependent on the temperatures of the systems and the properties of the intervening medium through which the heat is transferred. The three fundamental modes of heat transfer are conduction, convection and radiation.
Publisher. A+E Networks. In an event that is widely acknowledged to have sparked the outbreak of World War I, Archduke Franz Ferdinand, nephew of Emperor Franz Josef and heir to the Austro-Hungarian Empire, is shot to death along with his wife by a Serbian nationalist in Sarajevo, Bosnia, on this day in 1914.
How and why did World War 2 start? The Treaty of Versailles may have set the scene, but WW2's main progenitor was one man: Adolf Hitler. Most historians of the causes of World War 2 agree that its seeds were sown at the end of World War 1. How did the First World War start? In 1918, the War Guilt Clause of the Treaty of Versailles held Germany and Austria-Hungary responsible for the entire conflict and imposed on them crippling financial sanctions, territorial dismemberment and isolation.