16. Draw a free body diagram for the following situation. Mrs. Franks tries to take inventory of her lab equipment every year. IfMrs. Franks pushes a 9.7 kg box across her floor by exerting an 85 N force, but the force of friction between the tile and the cardboard box is 80N. What is the acceleration of the box once Mrs. Franks gets it moving? (show work)

4.at 0 ºc, some amount of energy is required to change 1 kg of water from a solid into a liquid. if you had a 2 kg piece of ice, what effect would this have on the amount of thermal energy required to change the water from a solid to a liquid? it would require more energy to change solid water into liquid water because there are more molecules in this larger piece of ice. it would still require the same amount of energy to change solid water into liquid water because the entire piece of ice would still gain the same amount of energy in each case. it would require energy to be removed from the 2 kg piece of ice. the larger piece of ice already has more total energy than the smaller piece of ice, so energy must be removed for the ice to become liquid. it would require less energy to change solid water into liquid water because the energy would spread through the ice more quickly and the ice already has a larger total amount of energy because it is larger than a 1 kg piece of ice.