Chapter 34301P34.30(a)If PSis the total power radiated by the Sun, and rEand rMare the radii of the orbits of theplanets Earth and Mars, then the intensities of the solar radiation at these planets are:IrESE=42πandIrMSM=42.Thus,IIrrMEEM=FHGIKJ=××FHGIKJ=211213401496 10577Wmm2.28 10 m2112ej..(b)Mars intercepts the power falling on its circular face:MMMIR==×LNMOQP=×ππ262165773 37 102 06 10ejejmW2...(c)If Mars behaves as a perfect absorber, it feels pressure PScIcand forceFPAIcRcMMM= =××2167206 10687 10..W3.00 10 m sN8.(d)The attractive gravitational force exerted on Mars by the Sun isFGM MrgSMM×⋅×××−2113023112216 67 101 991 106 42 10228 10164 10...N m kgkgkgmN22ejejwhich is ~1013times stronger than the repulsive force of part (c).P34.31
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .