State the values of $g$ and $G$ at the center of the Earth. Identify which of $g$ and $G$ is a vector and which is a scalar.

  • A
    $g = 0, G = 0$; both are scalars.
  • B
    $g = 0, G = 6.67 \times 10^{-11} \ Nm^2/kg^2$; $g$ is a vector,$G$ is a scalar.
  • C
    $g = 9.8 \ m/s^2, G = 6.67 \times 10^{-11} \ Nm^2/kg^2$; both are vectors.
  • D
    $g = 9.8 \ m/s^2, G = 0$; $g$ is a scalar,$G$ is a vector.

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