Heat TransferHard
Question
A liquid takes 5 min. to cool from 80oC to 50oC. How much time it take to cool from 60oC to 30oC′′? Temperature of surroundings is 20oC -
Options
A.10 min.
B.20 min
C.100 min.
D.9 min.
More Heat Transfer Questions
Radiation power of a black body at temp. 7oC is P1. When its temp. become 287oC, then emitting power is P2. The ratio of...Temperature of the sun is 6050 K and emitted wavelength is 4753. If the emitted wavelength of the star is 9506 then its ...The thermal capacities of two bodies are in the ratio of 1:4. If the rates of loss of heat are equal for the two bodies ...Calculate the energy radiated per minute from the filament of an incandascent lamp at 2000K if the surface area is 5 ...At 700 K temperatures the wavelength of maximum energy emitted by a body is 408 micron. If the temperature of body is in...