moonflower Posted March 23, 2010 Share Posted March 23, 2010 SO i dont have the radius or the volume but i have an estimate of the density 14.5 10³kg m-3 Im really uncertain of the formula needed to A. get the radius without the volume and vice versa. PLEASE HELP! Thanks in advance! Merged post follows: Consecutive posts mergedsome how must use the values above to get my answer?! Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted March 23, 2010 Share Posted March 23, 2010 If you have the density but no volume or radius, there's no way to determine the size or mass. Do you have any other additional information? Link to comment Share on other sites More sharing options...
Iggy Posted March 23, 2010 Share Posted March 23, 2010 SO i dont have the radius or the volume but i have an estimate of the density 14.5 10³kg m-3 Earth's inner core? Link to comment Share on other sites More sharing options...
Radical Edward Posted March 23, 2010 Share Posted March 23, 2010 SO i dont have the radius or the volume but i have an estimate of the density 14.5 10³kg m-3 Im really uncertain of the formula needed to A. get the radius without the volume and vice versa. PLEASE HELP! Thanks in advance! Merged post follows: Consecutive posts mergedsome how must use the values above to get my answer?! you need some spatial information. Density = mass/volume - you need two of those to work out the third. Link to comment Share on other sites More sharing options...
the tree Posted March 24, 2010 Share Posted March 24, 2010 you need some spatial information. Density = mass/volume - you need two of those to work out the third.Or some behavioural characteristic that you can derive those from. Buoyancy, displacement, urm.. weight? Link to comment Share on other sites More sharing options...
Mr Skeptic Posted March 26, 2010 Share Posted March 26, 2010 With that you can find an element with that density and give the radius of the element's atoms? I doubt that is your answer. I think you need more information. What is the full question? Link to comment Share on other sites More sharing options...
Severian Posted March 26, 2010 Share Posted March 26, 2010 Presumably, in the question, or in the lectures, you were given the radius of the Earth's inner core (1,220km). You can use that to find the volume and then use the density to find the mass. Link to comment Share on other sites More sharing options...
khaled Posted April 22, 2010 Share Posted April 22, 2010 so we have, density 14.5 * 10³kg m³ and, Density = mass/volume so, mass = density * volume ..and.. volume = mass / density ... mass = 14.5 * 10³ * volume ..&.. volume = mass / 14.5 * 10³ UNIT mass = 14.5 * 10³ * 1 kg ..for volume = 14.5 * 10³ m³ UNIT volume = 1 m³ / (14.5 * 10³) = 6.8965517241379310344827586206897e-5 UNIT volume (round) = 6.9 but the question is, how did you estimated the density in the first place, .. what are you working on, explain your geometrical work space ... Link to comment Share on other sites More sharing options...
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