question_answer 54)

    Calculate the average density of the earth in terms of g, G and R.

Answer:

  We know that, , where M = Mass of the earth, R = Radius of the earth. So, mass of the earth,               ...(i) If the earth is considered as a sphere of radius R and of material of density , then Mass of the earth = volume of the earth x density   [ volume of sphere  ]  From Eq. (i), we get