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Help calculating mass and escape velocity
Monkey
post Jan 21 2008, 07:47 PM
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If you have a kuiper belt object with say a diameter of 48km and assume a density of 1.5 gm/cm^3, how do you find the mass and escape velocity?

Sorry if this sounds elementary, I am just trying to learn. I think that the surface area would be 7,238km^2 (4pi(r^2)) and that the volume would be 57,905km^3 ((4/3)*pi*r^3). I seem to start getting into trouble solving for the mass (given that density = mass/volume.) Would the mass only be 1.5 * 57,905,000m^3 = 86,857,500m^3 = 86,857.5 kg? What would the escape velocity be?
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- Monkey   Help calculating mass and escape velocity   Jan 21 2008, 07:47 PM
- - ugordan   Watch out for the unit conversions. A common mista...   Jan 21 2008, 07:51 PM
|- - JRehling   I always liked the chestnut that escape velocity i...   Jan 21 2008, 08:03 PM
|- - qraal   Hi Guys "Monkey" has probably moved on ...   Jun 6 2008, 09:17 AM
- - Greg Hullender   I guess we're assuming this KBO is a sphere. :...   Jan 21 2008, 08:03 PM
|- - Monkey   QUOTE (Greg Hullender @ Jan 21 2008, 03:0...   Jan 21 2008, 09:50 PM
|- - alan   QUOTE (Monkey @ Jan 21 2008, 03:50 PM) Hi...   Jan 21 2008, 10:17 PM
- - Greg Hullender   By the way, I recommend against a 55-mile-per-hour...   Jan 21 2008, 08:31 PM
- - Greg Hullender   Monkey, there's a special technique called ...   Jan 21 2008, 10:44 PM
|- - Monkey   QUOTE (Greg Hullender @ Jan 21 2008, 05:4...   Jan 22 2008, 12:26 AM
- - Greg Hullender   Yes, 49 mph is what I got too. Like I said, 55 mp...   Jan 22 2008, 12:46 AM
|- - Monkey   QUOTE (Greg Hullender @ Jan 21 2008, 07:4...   Jan 22 2008, 02:51 AM
- - Greg Hullender   Sure, but first let me make another point about un...   Jan 22 2008, 04:38 PM

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