Question

At what rate is energy absorbed by a 10.0 m by 10.0 m roof that is painted white (emissivity= 0.100)? What if the roof was painted red (emissivity= 0.800)? Compute the rate of radiating energy from each roof. Which paint radiates has the greatest rate of energy?

In preparing your morning tea, 600. g of water at 90◦C is poured into a 200. g china pot (cpot = 0.84 kJ/kg/◦C) at 20◦C. The specific heat for water is 4.185 kJ/kg/◦C. What is the final temperature of the water?

Answer 1