Decades: 0s BC - 0s - 10s - 20s - 30s - 40s - 50s - 60s - 70s - 80s - 90s - 100s
80 81 82 83 84 85 86 87 88 89 90
Events:
Deaths:
... on the temperature difference across which the heat flows, as well as on the matter of the system under consideration and its geometry. There are three types of heat ...