A force of 15 newtons is used to push a box along the floor a distance of 3 meters. How much work was done?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Which of the following is not am example of a polymer? protein nylon kevlar concreta