The weight of an object on Earth is determined by

A. the mass of Earth.
B. the distance of the object from the center of Earth.
C. the mass of the object.
D. All of the choices.

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

How do you know how many valence electrons an atom has?