Q1. Alarge room at 30 °C surrounds two perpendicular plates with a common edge that measure 60 by 60 cm each. One plate is insulated with an emissivity of 0.5 and the other has an emissivity of 0.6 and a temperature of 620 °C. Estimate: (a) The temperature of the insulated plate. (b) The heat lost by the 620 °C plate.

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.