(a) At approximately what rate does the top of a person's head absorb the sun's energy on a clear day if it is covered with hair (e = 0.75), has a surface area of 225 square centimeters (assumed flat), and the person stands straight with the Sun making an angle of 40° with the vertical?

(b) What is the rate if it is bald with e = 0.20 under the same conditions?

Question

(a) At approximately what rate does the top of a person's head absorb the sun's energy on a clear day if it is covered with hair (e = 0.75), has a surface area of 225 square centimeters (assumed flat), and the person stands straight with the Sun making an angle of 40° with the vertical? 

(b) What is the rate if it is bald with e = 0.20 under the same conditions?

anonymous · Answer

Do you have any idea??

anonymous · Answer

mashy r u here to answer, if no then leave