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Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
The pain in angina pectoris may radiate to
In cardiac arrest chest pain may radiate to-
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is
How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .