Problem- Physicists are working very hard to precisely measure the radius of the proton (nucleus of 1H atoms). In July 2010 a measured value of 0.88 fm was reported and in January 2013 that value was updated to 0.84 fm. A. Calculate the density of the proton in g/cm3 using a value of 0.88 fm for the radius. B. Calculate the density of the proton in g/cm3 using the updated value of 0.84 fm for the radius. C. The established value of the radius decreased by approximately 4.5% as measurements improved. What is the % change of the density implied by this change in radius?
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