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find radiation force on roof(que no 8)
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Asked by ashutosharnold1998 | 27 Feb, 2020, 01:14: AM
answered-by-expert Expert Answer
Power delivered by sun on earth surface 1000 W / m2
 
Power absorbed by area 8 m × 20 m = 160 m2 × 1000 W/m2 = 1.6 × 105 W
 
Energy U received per sec , U = 1.6 × 105 J
 
Momentum P  = U/c = 1.6 × 105 J / ( 3  × 108 m/s ) = 5.33 × 10-4 kgm/s
 
force per second = P/t =  5.33 × 10-4 kg m/s2
Answered by Thiyagarajan K | 27 Feb, 2020, 22:01: PM

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