What prevents gravity from pulling you through the ground to the ...

[rl]

What prevents gravity from pulling you through the ground to the center of the Earth? Choose the best answer.
  1.The density of matter is too great.
  2.The positive nuclei of your bodys atoms repel the positive nuclei of the atoms of the ground.
  3.The density of the ground is greater than the density of your body.
  4.Atoms are bound together by chemical bonds.
  5.Electrons on the grounds surface and the surface of your feet repel one another.

Question 2

Is it feasible to use the physical properties of a simple pendulum to designate the standard values for any of the fundamental quantities? Justify your answer.

[fatboyy09]

Answer to Question 1

5

Answer to Question 2

Yes, length and time could be designated with a pendulum but mass could not. The
simple pendulum equation does not include mass.

[rl]

TY

[fatboyy09]

You're welcome