(Q).
Q: What force pulls objects toward the center of the earth?    Choices:  - kinetic energy  - centrifugal force  - momentum  - gravity  A:
(A).
gravity


(Q).
Q: Free atoms are spherical in shape, so the relative sizes of the elements can be compared by looking at each atom's atomic what?    Choices:  - weight  - axis  - angles  - radius  A:
(A).
radius


(Q).
Q: A pulley changes the direction of the force t exerted by the cord without changing its what?    Choices:  - longitude  - latitude  - position  - magnitude  A:
(A).

magnitude