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Syllabus

A blackbody of surface area 20 cm2is heated to a temperature of 600 K and is then placed on an insulated stand in a room at temperature 300 K. The initial rate of loss of heat from the body to the room is.....pls give a breif explaination

a) 10 degrees celsius

b) 15 degrees celsius

c) 20 degrees celsius

d) 25 degrees celsius

^{-1}k^{-1}. if a copper vessel of water equivalent 0.1 kg contains 4 kg of water at 30 degree centigrade then find the time required to raise the temperature of this water to the boiling point if 50 J of heat is supplied every second .^{-5}per degree centigrade ?The two equal sized water bodies fall in the air by 0.05 m/s fixed velocity,if there is a water molecule mixed with two bodies, then what is the extreme velocity of the water ?

Answer is 0.0794 m/s

b) water at 100 deg C c) water and steam at 100 deg C d) water, ice and steam at 50 deg C

(Latent heat of fusion = 80 cal/g, latent heat of vaporization = 540 cal/g and specific heat of water = 1 cal)...PLEASE SOLVE THIS QUESTION WITH EXPLANATION..