document.write( "Question 1156774: 2 spheres of the same density have a ratio of 9 to 16 in surface area. If the small sphere weighs 15 kg, what does the other sphere weighs. \n" ); document.write( "

Algebra.Com's Answer #779544 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "If the values of the surface area are in proportion 9:16, it means that\r\n" );
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document.write( "their radii are in proportion 3:4.\r\n" );
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document.write( "Then their volumes are in proportion  = 27:64.\r\n" );
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document.write( "Hence the weight (or better to say, the mass) of the larger sphere is\r\n" );
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document.write( "     =   kilograms = 35.555 kilograms.    ANSWER\r\n" );
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document.write( "(Assuming that they are continuum media with no voids inside, and are made of the same material).\r\n" );
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\n" ); document.write( "\n" ); document.write( "For your info:\r
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document.write( "    Kilograms as the measure of weight are not in use since 60-ies of the past century.\r\n" );
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document.write( "    Since that time and till now, only Newtons are used as a measure of forces (and as a measure of weight, in particular) \r\n" );
document.write( "    everywhere (excluding US), and everywhere in Physics, including US).\r\n" );
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document.write( "    Kilograms are still used as a measure of mass).\r\n" );
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