Considering the ima of this frictionless inclined plane, how much force is required to drag a 90 lb. box up it?

a.109 lb
b.10 lb
c.81 lb
d.9 lb

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory