Question

Sorry the units are all wrong, It is either supposed to be kg/m3 or kg or m. Thanks so much!!

4. One way than an oil company may discover new oil fields is by flying a balloon close to the ground and measuring ???? very precisely. Since the density of oil is less than the density of rock, the value of ???? will decrease. Assume that there is a spherical oil field of radius ???? = 103 ????, just below the surface. The density of oil is ???????????????? = 0.8 × 103 ????????/????3 and the density of the surrounding rock is ???????????????????? = 5.5 × 103 ????????/????3. The mass of the Earth is ???? = 6 × 1024 ???????? and the radius of the Earth is ???? = 6.4 × 106 ????. By what fraction will the value of ???? decrease when the balloon is just above the center of the oil field? (Hint: use ???? + ???? = ????)

Answer 1