1 Soldering more than 3 rings can cost $55 to $75. 2  The price for removing a stone from a ring can fall between $6 and $50 depending on the type of ring and its size. 3  Straightening or refinishing a ring can cost between $14 to $50. 4  For example, the website BCDeskin.com offers repair for various types of jewelries.
By matching the Measured Density to the Calculated Density, you are likely to find values similar to the following: Earth has a core filling about 65% of its interior. Venus: 65%, Mars: 40%, Mercury: 80%, The Moon: 40%.
Flip through the 5 terrestrial planets and notice that Mercury has the highest uncompressed density, 5.40 grams per cubic centimeter. Determine the ratio of rock to metal that matches the uncompressed density of Mercury. You should get a proportion close to 80% metal and 20% rock.