Cindy exerts a force of 40 n and moves a chair 6 m. her brother and he pushes a different chair for 6 m while exerting a force of 30 n. andy does: more, less work than cindy. the difference of their amounts of work is: 20, 40, 60, or 180 nm.

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter