Cuál fue el aporte en escritura arquitectura y pintura de los egipcios​

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?