When a hammer strikes a nail, the nail.. exerts balanced forces that helps it from moving.

exerts a force equal to the weight of the hammer..

exerts an unbalanced force that changes its velocity.

exerts an equal and opposite force back on the hammer.

Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.