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tisha22_goa (0)

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de sun radites energy in all direction . de average raditians receved on earth surface on earth frm sun per sec is 1.4kilowatt/metre2 de average earth earth sun distance is 1.5*1011
metre de mass lost by de sun per day [ i day = 86400] is
1. 4.4 *10 raise to 9
2.7.6*10 raise to 14
3. 3.8 *10 raise to 12
4. 3.8*10 raise 14
    
iitkgp_bipin (6498)

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Intensity of the radiations = 1.4 kW/m2 = 1400 W/m2

Hence energy emitted per unit time = (intensity)(4r2) = (1400){4(1.5x1011)2}

Hence energy emitted per day = (1400){4(1.5x1011)2}(86400)

Equate this to mc2 to find the mass converted into energy per day.

mc2 = (1400){4(1.5x1011)2}(86400)

m(3x108)2 = (1400){4(1.5x1011)2}(86400)

m = (1400){4(1.5x1011)2}(86400)/(3x108)2
 

Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur

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