John pulls a box with a force of 4 N, and Jason pulls the same box from the opposite side with a force of 3 N. Ignoring friction, which of the following statements is true?
a. the box moves toward John
b. the box moves toward Jason
c. the box does not move
d. there is not enough information to
determine if the box moves.

Avalue that describes how heavy an object is and is related to the force of gravity is

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?