Part A The earth’s radius is 6380 km and its mass is 5.97 ×1024 kg. The gravitational constant is 6.

Part A The earth’s radius is 6380 km and its mass is 5.97 ×1024 kg. The gravitational constant is 6.67 ×10-11 N ∙ m2/kg2. If Hubble’sconstant has the experimental value 1.8 × 10-18s-1 (although this can change due to futuremeasurements), calculate the critical density of the universeneeded to stop the expansion of the universe. Express your answer using two significant figures. (kg/m^3) Part B If the earth had this density, what would be its radius? Expressyour answer in meters. Express your answer using two significant figures. (m) Part C If the earth had this density, what would be its radius? Expressyour answer as a multiple of its present radius. Express your answer using two significant figures. (times itspresent radius) . . .

 

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