Answer:
Mass is the measure of an object's matter (what it's made up of). The greater an object's mass, the greater its gravitational force. The earth has a strong attracting force for objects with smaller mass (including the moon), and the sun has an attracting force on the earth and other planets in our solar system.
Mass & Height above the ground
Nothing works if Switch-3 is open.
-- None
-- A, E, F, G
-- None
-- A, B, E, F, G
-- A, C, D, E, F, G (everything except B)

Where F is force, m is mass and a is acceleration.

Hope this helps.
r3t40
The source of energy that keeps the Sun shining today is _________.
<u>Is nuclear fusion</u>
~Hope this answers your question!~